1918:
Hall Bayliss & Co
Hall Bayliss & Co - Aeronautical Sheet Metal Workers
Rec. Num. 1 of 2
Source: Flight March 21st 1918
1918:
Hall Bayliss & Co
Hall Bayliss & Co - Aeronautical Engineers & Sheet Metal Workers
Rec. Num. 2 of 2
Source: Flight November 7th 1918