1939:
Gresham & Craven Ltd
Gresham & Craven VAPOR-CLARKSON Oil Fired Steam Generator
Rec. Num. 1 of 2
Source: Aeroplane September 21st 1939
1961:
Gresham Lion Electronics Ltd
Gresham Leocast Missile Recording Heads
Rec. Num. 2 of 2
Source: Aeroplane October 12th 1961