Austin Champ chassis numbers

Champs carry the War Department census number painted on the body and a chassis plate with the FV1801 designation and a serial; civilian WN1 and WN3 Champs and the Gipsy carry a BMC chassis plate on the bulkhead with a model code (G4M10, G4M15, GS4M for the Gipsy) and a sequential number, with the engine number stamped on the block. [1][2]

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2NUMBERING SCHEMES0SEQUENCES LISTED3VEHICLES IN THE REGISTRY2SOURCES

Where to find it

The plate on the bulkhead or under the bonnet; the chassis stamping on the frame rail; the War Department census number on the bonnet and tailgate of military vehicles.

How to read it

1951–1956 (Champ)FV designation + census number: The vehicle is FV1801 (FV1802 for the FFR) with a War Department census number in the 00 BE / 00 ZZ series and a chassis serial on the plate.
1958–1968 (Gipsy)Model code + serial: G4M10 (90 in, petrol), G4M15, GS4M and their diesel equivalents with a sequential chassis number on the BMC plate; the suffix records the suspension type after the leaf-sprung version appeared.

Prefixes

Prefix or code	Means
FV1801	Austin Champ, military
WN1 / WN3	Civilian Champ (WN3 with the Austin A90 engine)
G4M10	Gipsy 90-inch
G4M15 / GS4M	Gipsy long wheelbase and later codes

Sources

1Austin ChampWikipedia · accessed 2026-09-22
2Austin GipsyWikipedia · accessed 2026-09-22

The numbers are as the sources cited above record them — the parts trade's frame-number charts, the clubs' transcriptions of the makers' bulletins and the enthusiast decoders; a blank cell means no number is recorded. Registry research, not a factory record — check the vehicle's plate and the maker's build record before relying on a range. Corrections through the suggestion form.