Aeroplane engine, Green

Four cylinder aeroplane engine of 35 brake horsepower, example of the earliest type of aeroplane engine built in Britain, built for the Green Engine Co. Ltd, by the Aster Engineering Co., London, 1909

Wireless telegraphy / transmitter

Sterling W/T transmitter for wireless telegraphy with parts by W.D. Wireless of Soho and W.R. Morris of Birmingham