1918:
Hooper & Edman Ltd
Hooper & Edman. - Aeronautical Sheet Metal Workers
Rec. Num. 1 of 2
Source: Flight April 25th 1918
1918:
Hooper & Edman Ltd
Hooper & Edman. - Spring Hill Foundry, Birmingham. 1918 Advert
Rec. Num. 2 of 2
Source: Flight May 9th 1918