1939:
Tilghman's Patent Sand Blast Co Ltd
Tilghman's Patent Sand Blast Machinery
Rec. Num. 1 of 2
Source: Aeroplane July 26th 1939
1946:
Tilghmans Patent Sand Blast Co Ltd
Tilghmans Patent Sand Blast Machinery - Shot Blasting
Rec. Num. 2 of 2
Source: Aircraft Production February 1946
