1917:
W.T.Clark & Co
W.T.Clark. Green Terrace, Roseberry Ave. Aero Sheet Metal Work
Rec. Num. 1 of 2
Source: Aeroplane November 7th 1917
1919:
W.T.Clark & Co
W.T.Clark. Metal Spinners & Sheet Metal Work
Rec. Num. 2 of 2
Source: Aeroplane March 12th 1919