Description:
Grover & Co. technical drawings: Technical drawing of Dimension Sheet for Type E.S.R. 10 & 11 Single Worm Reduction Geared Motor. Electropower Gears Ltd, Kingsbury Works, Kingsbury Road, London, NW9. Drawing number M139. Drawn by R.R. Scale not given. Date 10 May 1950. 37cm x 27cm. NB this is a copy not the original drawing.