Click on the manufacturer in the left hand column to see their stamps. Graphics created by Walt Witherspoon. Some stamps courtesy of Craig Fuller. Note: Portions of stamp graphics noted by dotted lines are estimates of missing details.
Beech Aircraft, Bell Aircraft, and Bendix Corp. all use very similar QA stamps with a single letter "B" and the inspector's number. Telling the various forms of these stamps apart can be impossible. Lockheed T-33s also have a form of "B" stamp not seen on other Lockheed planes so far in research. Bendix stamps use a fonts in which the lower lobe of the B is wider than the upper lobe but in general trying to identify a crash site with only a "B" stamp found is uncertain if other stamps, part numbers, or specific known crash locations are unavailable.
Many planes share identical or similar heat treatment "HT" stamps. The common form is the letters HT above or below the inspector's number, all within a circle. Because of the similarity across different manufacturers' planes the common "HT" stamp is not useful in making a specific identification.
Download a inspection stamp PDF for offline use.
| Beechcraft | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
AT-7B | Beechcraft |
 |
C-45H | Beechcraft |
 |
C-45H | Beechcraft, unusual "B" stamp w/alpha character |
 |
C-45H | Beechcraft |
 |
T-34 | Beechcraft |
 |
T-34 | Beechcraft |
| Bell | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
P-39, P-59, P-63 | Bell |
 |
P-59 | Bell |
 |
P-59 | Bell |
 |
P-63, P-59 | Bell, F has distinct serifs. |
 |
P-59 | Bell, probable heat treat stamp |
 |
P-59 | Bell, probable heat treat stamp |
 |
Unk | Stamp seen on isolated fragment which also had Bell "Be" and HT stamps. Bell product, exact type unknown. |
| Bendix (Accessories & Landing Gear) | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
Various | Bendix, found on Bendix fuel control of Allison J-33 turbojetengine.B is distinctly "fat" with small upper lobe. May appear on other Bendix products. |
 |
Various | Bendix, found on Bendix made outer "pogo" strut of B-47E. May appear on other Bendix products. |
 |
R-2800 | Eclipse Pioneer division of Bendix. Found on R-2800 accessory drive gearbox identiplate. |
| Boeing | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
B-17 | Boeing, red inked stamp, not indented |
 |
B-29 | Boeing, seen on fuselage structure & castings. |
 |
B-29 | Boeing, seen on wing joint forging. This stamp very similar to Bell "Be" stamp. Wing section possibly from Bell built aircraft |
 |
B-29 | Boeing, found on wing components produced by Alcoa. |
 |
B-29 | Boeing, found on wing components produced by Alcoa. Similar stamp also seen on Lockheed YP-80A part. |
 |
B-29 | Boeing, found on wing components produced by Alcoa. |
 |
B-29 | Boeing, found on wing components produced by Alcoa. |
 |
B-29 | Boeing, found on many major component identiplates |
 |
B-29 | Boeing, found on identiplate of Briggs Mfg. Co. made B-29 part. |
 |
B-47B | Boeing, B-47B structure stamp, Boeing Witchita division |
 |
B-47E | Boeing or sub-contractor, found on B-47E gear door identiplates |
 |
Unk | Found on debris left from Edwards AFB sled tests. (Numerous Boeing parts in area, Boeing Witchita division stamp) |
 |
B-52B | Boeing, from B-52B mod plate.(NASA B-52B) |
 |
B-50, C-97 | Boeing, seen on B-50, C-97, and post 1950 debris of Boeing product at Edwards AFB sled track.Stamp is very small. May appear on other late 40s to 1950s Boeing products. |
| Canadair | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
F-86F | Canadair, appears on license built Sabre.Stamp is stylized "C" with inspector's number stacked vertically. |
 |
F-86F | Canadair or part subcontractor for Canadair. Seen on actuator in wing of Canadair built F-86F |
| Cessna | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
T-37, A-37B | Cessna |
| Chance Vought - LTV | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
F4U | Chance Vought plane, found on Corsair wing flap.Probably sub-contractor stamp. |
 |
F4U | Chance Vought plane, on part from wing tip repair kit. Probably sub-contractor stamp. |
 |
F4U | Chance Vought, found on Corsair wing flap |
 |
F4U | Chance Vought, found on main gear casting |
 |
F4U | Chance Vought, found on trim tab bracket |
 |
F4U | Chance Vought, found on trim tab bracket |
 |
F4U | Chance Vought, found on various parts & mod plates Very odd shape, stylized V with "bull ring" and apparent top of "S" sticking out above inspector's number. |
 |
F4U-4 | Chance Vought aircraft, stamp seen on identiplate of late model, possibly Navy Depot stamp. |
 |
F4U, F7U, F8U, A-7, Regulus | Chance Vought |
 |
F8U-1 | Chance Vought aircraft, Octagon "G" Grumman stamp found on gear door mod plate.Door built by Grumman under sub-contract to Chance Vought. |
 |
RF-8A | Chance Vought |
 |
TA-7C | Ling Temco Vought |
 |
A-7E | Ling Temco Vought |
 |
A-7 | Ling Temco Vought |
 |
YA-7F & TA-7C | Ling Temco Vought |
| Consolidated/Vultee - Convair - General Dynamics | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
BT-13 | Vultee |
 |
B-24J | Consolidated Fort Worth division built B-24J.Probable heat treat stamp. |
 |
C-131, TF-102A | Convair, San Diego facility. |
 |
C-131 | Convair |
 |
Unk | Convair, San Diego. (EAFB sled test debris, probable F-102) |
|
Unk | Convair, San Diego. (EAFB sled test debris, probable F-102) |
 |
Unk | Convair, San Diego. (EAFB sled test debris, probable F-102) (indented on same parts as "CVSD" stamps above) |
 |
C-131 | Convair, San Diego.Also seen on EAFB sled test debris, probably F-102 or F-106. |
 |
Unk | Convair, San Diego. (EAFB sled test debris, probable F-102) (inked stamp, not indented) |
 |
PQM-102 | Convair, drone conversion |
 |
B-58, F-102A | Convair, Fort Worth facility. |
 |
F-111, F-16 | General Dynamics, Fort Worth facility |
 |
F-16 | General Dynamics |
 |
F-16 | General Dynamics |
 |
EF-111A | General Dynamics aircraft, modern Grumman stamp.On parts added by Grumman as part of modification from F-111A to EF-111A.Stamp is inked, not indented. |
| Curtiss | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
AT-9 | Curtiss, seen on vertical fin spar identiplate in AT-9 "Jeep" wreckage. |
 |
C-46 | Curtiss, also seen without inspector's number |
 |
P-40, C-46 | Curtiss, found on various structure parts |
 |
P-40 | Curtiss, seen on Curtiss identiplate in P-40 wheel well. |
 |
C-46 | Curtiss |
| DeHavilland Canada | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
DHC-4 | DeHavilland Canada, may appear on other DHC products. |
| Douglas | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
B-18 | Douglas, seen on flap identiplates and brackets. |
 |
C-47 | Douglas |
 |
C-47 | Douglas |
 |
C-47 | Douglas |
 |
C-47, F3D | Douglas |
 |
C-47, A-24B | Douglas, stamp small with no numbers |
 |
C-124 | Douglas |
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A3D | Douglas |
 |
A-4 | Douglas |
 |
A-4E | Douglas |
 |
A-4E | Douglas |
 |
AD-6, F4D-1 | Douglas |
 |
A3D, A-4 | Douglas |
 |
A3D, F3D-2, F4D-1 | Douglas |
 |
AD-6 | Douglas, on mod plate |
 |
AD-6 | Douglas |
 |
AD-6 | Douglas |
 |
AD-6 | Douglas |
 |
AD-26 | Douglas |
 |
A-26 | Douglas |
 |
A-26 | Douglas |
 |
A-26 | Govt. customer inspection QA stamp |
 |
A-26 | From A-26 bomb bay door stamped "Beech" |
 |
A-26 | From A-26 bomb bay door stamped "Beech" |
 |
A-26 | Douglas |
 |
A-26 | Douglas |
 |
A-26 | Douglas, looks like bulged fusion of letters D and B. Several seen at A-26B crash site. |
| Fairchild | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
C-82, C-119 | Fairchild |
 |
C-119 | Fairchild |
 |
C-119 | Fairchild |
 |
C-119 | Fairchild, found on C-119 engine cowl brackets |
 |
C-119 | Fairchild or sub-contractor. Seen on cargo door hinge castings. |
 |
C-119 | Fairchild, found on C-119 engine cowl brackets. Possibly sub-contractor QA stamp. |
| General Electric (Engines & Turbos) | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
GE Turbo | General Electric, found on turbo housing at P-38 crash site. |
 |
GE Turbo | General Electric, found on turbo housing at P-38 crash site. |
 |
GE I Series | GE stamp seen on early P-59 engine, I-16 or I-30 series gas turbine. Inked stamp, not indented. |
 |
J-47-GE-13 | General Electric turbine blade mark, etched |
 |
J-47-GE-13 | General Electric turbine blade mark, etched |
 |
GE J-79 | General Electric, found in etch form on some J-79 blades. |
 |
GE J-79 | General Electric, small stamp found in etch form on some J-79 compressor blades. |
 |
GE YJ-93 | General Electric, etched on some YJ-93 stator vane arms. YJ-93 used on XB-70. |
| Grumman | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
F6F | Grumman, found on Hellcat wing fold casting |
 |
F6F | Grumman, found on Hellcat wing fold casting |
 |
F6F | Grumman |
 |
F6F | Grumman |
 |
F6F | Grumman, possible heat treatment stamp |
 |
F6F | Grumman, possible heat treat stamp |
 |
F6F | Grumman, Rhomboid "G", closed rhombus F6F example seen is distinctly flattened vs. true square |
 |
F8F | Grumman, small stamp seen on main gear linkage made by Bendix. Probable heat treat stamp. |
 |
TBM-3 | General Motors built Grumman aircraft |
 |
TBM-3 | General Motors built Grumman aircraft (probable heat treat stamp, inked, not indented) |
 |
SA-16, F9F-4 | Grumman |
 |
SA-16 | Grumman |
 |
OV-1 | Grumman, inked stamp, not indented |
 |
A-6 | Grumman |
 |
A-6 | Grumman |
 |
A-6 | Grumman |
 |
F-14A | Grumman |
 |
F9F-2, S2F, OV-1, F-14A | Grumman, Octagonal G stamp. Also seen on Grumman made sub-contract parts of other planes. |
 |
F9F-2 | Found on a small fraction of stamped parts at F9F-2 crash. Possibly sub-contract parts made by Republic |
 |
F8F, F9F-2 | Grumman, Rhomboid "G", open rhombus |
| Hiller | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
H-23 | Hiller Helicopters |
 |
H-23 | Hiller or sub-contractor for Hiller.Seen on H-23 Raven tail boom mount castings. |
| Kaman | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
Kaman | |
| Keystone | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
Unk | Keystone aircraft, variant unknown (Keystone was 1920s and 30s era military plane builder) |
| Lockheed | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
P-38 | Lockheed |
 |
P-38 | Lockheed, found on debris of later variant, J or L model |
 |
P-38 | Lockheed, probable heat treat stamp |
 |
P-38 | Lockheed, probable heat treat stamp |
 |
P-38 | Lockheed |
|
P-38 | Vultee built Lockheed P-38 |
 |
P-38 | Found on spare P-38 part, inked stamp, not indented |
 |
P-38 | Lockheed, probable heat treat stamp |
 |
P-38J | Lockheed, on nose gear link |
 |
P-38J | Lockheed, on nose gear link |
 |
P-38 | Lockheed |
 |
P-38 | Lockheed |
 |
P-38 | Lockheed |
 |
P-38 | Lockheed, found on casting at later variant P-38 crash |
 |
PV-2 | Lockheed, parenthesis are distinctly larger than numbers. |
 |
YP-80A | Lockheed |
 |
YP-80A | Lockheed |
 |
P-80, C-121, P2V | Lockheed, number of digits varies |
 |
F/P-80A/C | Lockheed |
 |
P-80A | Lockheed |
 |
P-80, T-33, C-121 | Lockheed |
 |
F/P-80A/C | Lockheed |
 |
PV-2, C-121, P2V | Lockheed, probable heat treat stamp |
 |
P-80 | Lockheed |
 |
T-33, F-94 | Seen in company inspection block of T-33 and F-94 identiplates |
 |
F-94, C-121, P2V | Lockheed, number of digits varies |
 |
F-94B | Lockheed |
 |
T-33, F-104 | Crossed oval seen on T-33 structure, F-104N parts. Always seen with W in one quadrant. Also seen on Vertol CH-47 (See Vertol.) |
 |
C-121 | Crossed oval seen on Lockheed C-121 structure. |
|
P-80, F-104 | Lockheed, probable heat treat stamp |
 |
P-38, F-104 | Lockheed |
|
T-33A | Lockheed, similar to Bendix, Beech, and Bell "B" stamps |
 |
T-33A | Lockeed, seen on very early block 1 T-33A identiplate |
 |
T-33A | Lockheed, probable heat treat stamp. |
 |
C-130 | Lockheed, seen on very early C-130 built in 1956.Also seen with larger L relative to other characters. Inked, not indented. |
 |
C-130 | Lockheed, seen on very early C-130 built in 1956. Inked, not indented. |
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C-130 | Lockheed, seen on very early C-130 built in 1956. Found next to electrical ground points, probable bonding check stamp. Inked. |
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F-104 | Lockheed, seen with both 4 numbers and 3 numbers. Inked stamp |
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F-104N | Lockheed, found on F-104N parts, may also appear on other F-104 variants. |
 |
U-2, SR-71A, F-117A | Lockheed Skunk Works |
 |
SR-71A | Lockheed (stamp on exhaust "turkey feather" segments), Etched. |
 |
SR-71A | Lockheed, found on SR-71 Flight Control Mixer Assembly.Etched. |
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SR-71A | Lockheed or subcontractor to Lockheed, found on component of SR-71 Flight Control Mixer Assy. |
 |
F-117A | Lockheed, inked, not indented. |
| Martin | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
B-57 | Martin, most common stamp on B-57s. |
 |
AM-1, B-57 | Martin, probable heat treat stamp. |
 |
B-57 | Martin, stylized "M" composed of arc sections. Found on steel uplock hook at B-57 crash site. |
| McDonnell - McDonnell Douglas | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
F2H, F3H, F-101, F-4, F-15 | McDonnell - McDonnell Douglas (the most common McDonnell - MD stamp) |
 |
F2H | McDonnell |
 |
F2H | McDonnell |
|
F-101B | McDonnell aircraft, seen on flap and aileron identiplates.Stamp identical to Martin stamp, parts probably Martin sub-contracted. |
 |
F-4 | McDonnell (more common on Republic products) Possibly sub-contract part made by Republic |
|
F-4 | McDonnell, also found on other manufacturers' planes |
 |
F-4 | McDonnell |
 |
F-18B | McDonnell Douglas |
| North American | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
O-47A, F-86, F-100A/C, FJ-3 | North American |
 |
AT-6D | North American |
 |
AT-6D | North American |
 |
AT-6D | North American |
 |
AT-6D | North American |
 |
P-51D | North American |
 |
B-24J | North American Dallas division built B-24 |
 |
B-25 | North American |
 |
B-25 | North American |
 |
B-25 | North American |
|
B-25J | North American |
 |
P-51D | North American, probable heat treat stamp |
 |
F-86F | North American (probable Govt. QA stamp) |
 |
F-86F | North American |
 |
T-28A | North American, possible heat treat stamp |
 |
F-86E | North American (unusual mod plate stamp) |
 |
F-100A | North American, unusual ANA stamp seen at crash site of 2nd production F-100A. Large letters and single W vs. numbers. |
 |
F-100 | North American, probable heat treat stamp. |
 |
F-100, XB-70, Rockets | North American and Rockwell Rocketdyne, seen in impact form on F-100 variants, etched on XB-70, and impacted on J-2 Rocket motor parts. |
 |
XB-70, X-15 | North American, etched on both XB-70 and X-15. |
 |
XB-70 | North American, etched. |
 |
XB-70 | North American, etched. |
 |
XB-70 | North American, etched. |
 |
XB-70 | North American, etched. |
 |
XB-70 | North American, etched. |
 |
XB-70 | North American, etched. |
 |
XB-70 | North American, etched. |
 |
XB-70 | North American, etched. |
 |
XB-70 | North American, example seen was apparently etched as a Digits were backwards. |
 |
XB-70 | North American, etched. |
| Northrop | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
F-89 | Northrop; inked stamp, not indented |
 |
F-89 | Northrop; inked stamp, not indented |
 |
F-89 | Northrop, seen in normal indented form on YF-89D structure debris at crash site. |
 |
F-89 | Northrop, probable heat treat stamp, found indented on YF-89D structure fragments. |
 |
F-89, F-5 | Northrop, inked stamp, not indented |
 |
T-38A | Northrop Norair division, found on T-38 main gear strut identiplate. |
 |
A-9A | Northrop, inked stamp, not indented |
| Piasecki | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
H-21, H-25 | Piasecki Note: Piper light planes have essentially identical Piper stamp. |
 |
H-21 rotor | Piasecki or sub-contractor for Piasecki, found on H-21 rotor blade mod plate. |
| Pratt & Whitney (Engines) | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
R-2800 | Pratt & Whitney |
 |
Unk Radial | Seen on cylinder heads of poor condition Pratt & Whitney radial of R-1830 or R-2800 series. |
 |
R-2800 | Pratt & Whitney engine built under licence by Ford Motor Co. |
 |
R-4360 | Pratt & Whitney |
 |
PW J-75 | Pratt & Whitney stamp on ignition box of retired J-75 turbojet engine from U-2 program.Similar form also found hand engraved on PW J-58 engines from SR-71/A-12. |
 |
J-57, J-75 | Pratt & Whitney |
 |
PW J-75 | Pratt & Whitney engine, stamp found on compressor case made by Ford Howard. |
 |
PW J-75 | Pratt & Whitney engine, stamp found on compressor case made by Ford Howard. |
| Republic | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
P-47D | Republic aircraft, found on main gear strut oleo link, possibly landing gear sub-contractor QA stamp. |
 |
P-47D | Republic, probable heat treat stamp.Example seen was struck off angle, only lower half of stamp was imprinted. |
 |
F-84F, F-105 | Republic "stretched R" |
 |
F-84F | Republic, another "stretched R" |
 |
F-84F | Republic, unusual stretched P |
 |
F-84G | Republic, "stretched J" |
 |
F-105 | Republic "stretched P" |
 |
F-84C, F-105 | Republic "short R" |
 |
F-84F | Republic |
 |
F-84F | Republic |
 |
F-84F | Republic (no border) |
 |
F-84 | Republic |
 |
F-84F | Republic ("CE" stamp is Cessna, probable sub-contract part.) |
 |
F-105 | Republic |
| Rockwell (Including North American Aircraft Operations) | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
T-2, OV-10 | Rockwell NAAO |
|
T-2 | Rockwell NAAO, also seen on F-100 series. |
 |
B-1A | Rockwell NAAO, small inked stamp, not indented |
 |
B-1A | Rockwell NAAO, small inked stamp, not indented |
 |
B-1A | Rockwell NAAO, found on B-1A escape capsule.Inked stamp, not indented |
 |
B-1A | Rockwell NAAO, found on B-1A escape capsule.Inked stamp, not indented |
 |
B-1A | Rockwell NAAO, found on B-1A escape capsule.Inked stamp, not indented |
 |
Rockets | Rockwell Rocketdyne division stamp, found on various Rocketdyne products including J-2 rocket engine. |
| Ryan (Including Teledyne Ryan) | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
Unk | Ryan, seen on isolated part bearing newer form inked part number with 147 prefix.Probably later model drone. |
| Sikorsky | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
HR2S | Sikorsky, on mod plates of HR2S Helicopter |
 |
HSS-1 | Sikorsky |
| Temco | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
TT-1 | Temco |
 |
TT-1 | Temco |
| Vertol | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
CH-47A | Vertol, bottom of V is distinctly rounded.Vultee "V" stamp is similar but V has sharp vertex. |
|
CH-47A | Crossed oval seen on toe brake hydraulic cylinder.This stamp seen far more often on Lockheed products. |
| Wright Aeronautical (Engines) | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
R-2600 | Wright Aeronautical |
 |
R-2600 | Wright Aeronautical |
 |
R-3350 | Wright Aeronautical, seen on R-3350 Turbo Compound identiplate. |
 |
J-65B-7 | Wright Aeronautical |
 |
J-65B-7 | Wright Aeronautical |
 |
J-65B-7 | Wright Aeronautical |
 |
J-65B-7 | Wright Aeronautical |
 |
J-65B-7 | Wright Aeronautical |
 |
J-65B-7 | Wright Aeronautical |
| Miscellaneous stamps | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
Various | Chevrolet Motors casting mark.Seen as cast-in mark on various aircraft such as P-38, F7F, B-25. |
 |
B-17, P-47D | "curved M" stamp seen on mod plates on B-17 and P-47D B-17 mod plate specified part built by Murray corp. |
 |
P-47D, B-24L | Found on structure parts of P-47D and Ford built B-24L.May also appear on other types. |
 |
B-24L | Seen on Ford Motor Co. identiplate on Ford built B-24L part. |
 |
Various | Edo Aircraft Corporation.Seen on Edo identiplate on Vought OS2U Kingfisher main float.Edo manufactured floats for many types of floatplanes & flying boats. |
 |
V-1650-7 | Stamp on head of Packard built V-1650-7 Merlin V-12 |
 |
P-38 nuts | Tiny stamp seen on nuts used on P-38 (Letters FJ may also be LJ or TO) |
 |
Various | Stamp seen on identiplate of Janitrol aircraft heater mounted in Vertol CH-47A helicopter. May appear in other types. |
 |
R-975 | Continental Aircraft Engines stamp found on R-975 radial. |
 |
Various | Aerol stamp. Found on landing gear components made by Cleveland Pneumatic Tool Co. Various planes & choppers. |
 |
H-23 | Advance Gear and Machine Co. stamp.Seen on tail rotor gearbox of Hiller H-23. |
 |
Curtiss hub | Inked stamp found on Curtiss electric propeller hub assembly. Not specific to any one aircraft type. |
 |
Curtiss hub | Inked stamp found on Curtiss electric propeller hub assembly. Not specific to any one aircraft type. |
 |
Various | Menasco Corp. QA. Landing gear manufacturer. Found on landing gear components of various types. (1940s - 50s era) |
 |
P-80 | Found on P-80 main landing gear leg, probably Menasco Corp. stamp. |
 |
Various | Menasco Corp. Canada. Seen on Fairchild A-10 gear strut. |
 |
Old engines | Found on engine block of 1918 vintage Curtiss OX-5 V-8 aircraft engine. Also seen on similar vintage Hall & Scott V-8 engine. |
 |
OX-5 | Found on engine block of 1918 vintage Curtiss OX-5 V-8 aircraft engine. OX-5 manufactured by Curtiss and other firms. |
 |
OX-5 | Found on engine block of 1918 vintage Curtiss OX-5 V-8 aircraft engine. OX-5 manufactured by Curtiss and other firms. |
| Government QA (Customer Inspection) | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
Various | Common form of US Govt. Customer Inspection stamp (generally found on modern types, post 1950) |
 |
Various | Customer Inspection This form seen on H-21 rotor blade mod plate, 1957 |
 |
Various | Customer Inspection, usually seen on Navy / Marine planes. |
 |
Various | Customer inspection |
 |
GE I-16 | Customer inspection of GE I-16 gas turbine part |
 |
GE I-16 | Customer inspection of GE I-16 gas turbine part |
 |
Various | Customer inspection |
 |
Various | Customer inspection |
 |
Various | Customer inspection |
 |
Various | Customer Inspection, found on various pre WWII aircraft and pre WWII engine components. Also seen without "base" making stamp appear as large A with same internal details. |
 |
Canadian | Royal Canadian Air Force Govt. QA stamp.Found on various Canadair and other Canadian built aircraft. This form seen on Canadair T-33A seat. |
| Unknown Stamps (from sites or parts not yet identified) | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
Unk | From WWII or earlier canopy frame at Edwards AFB |
 |
Unk | From isolated fragment on dirt road north of EAFB. North American product |
 |
Unk | Found on mounting flange of accessory or sub-assembly component at F9F-2 crash site.Stamp of accessory manufacturer, not likely Grumman stamp. |
 |
Unk | Found on mounting flange of accessory or sub-assembly component at F9F-2 crash site.Stamp of accessory manufacturer, not likely Grumman stamp. |
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Unk | |
| General Aviation (Light Plane) stamps | ||
|---|---|---|
| Stamp | Aircraft | Comment |
 |
Cessna | Cessna light planes, examples seen were all inked, not indented. |
 |
Piper | Piper light planes.Piper stamp is essentially indistinguishable from Piasecki helicopter stamp. |