1912:
The Buckman Engineering Co Ltd
Buckman Engines - Buck 600 cc Motor Cycle Engine
Rec. Num. 1 of 2
Source: Motor Cycling June 25th 1912
1953:
Robuck Motors
Robuck Motors, Forest Gate. Motorcycle Engineers
Rec. Num. 2 of 2
Source: Motor Cycling January 15th 1953