1928:
William Beardmore and Co Ltd
Beardmore 800 To 1,000 b.h.p. Aero Engines
Rec. Num. 121 of 122
Source: Aeroplane January 11th 1928
1929:
William Beardmore and Co Ltd
Beardmore Tornado Engine - For Airship Work. Crude Oil Or Petrol
Rec. Num. 122 of 122
Source: Aeroplane January 9th 1929