From RROCA-info

Number produced: 1,201

Original Specification: 6 cylinders, overhead valves, 89 mm. x 114 mm. (4257 c.c), Stromberg carburettor, S.U. petrol pumps, single plate clutch, 4 speeds, coil ignition with standby coil, 4 wheel brakes with servo plus independent handbrake, suspension semi-elliptic front and rear, wheelbase 132", chassis weight 2900 lbs., tyres 6.00 x 19.

Chassis Series	Year	Comments
GUL 1-82	1936/37
GTL 1-81	1936/37
GHL 1-41	1936/37
GRM 1-81	1936/37
GXM 1-81	1936/37
GGM 1-41	1936/37
GAN 1-81	1936/37	New type steering controls
GWN 1-81	1936/37
GUN 1-41	1937
GRO 1-81	1937
GHO 1-81	1937
GMO 1-41	1937
GRP 1-81	1937
GMP 1-81	1937
GLP 1-41	1937
GAR 1-81	1937/38
GGR 1-81	1938
GZR 1-41	1938