Laboratory stopclock by W.G Pye & Co. Ltd., Cambridge, measuring seconds on main dial and minutes on subsidiary dial. Laboratory stopclock by W.G Pye & Co. Ltd. 1950-1974
Stopclock with resettable minute and second hands, by Townson and Mercer Ltd., London Stopclock with resettable minute and second hands 1900-1980
Stopclock in plastic case by W.G. Pye and Co. Ltd., Cambridge, c.1950 (glass cracked) Stopclock in plastic case by W.G. Pye and Co. Ltd. 1945-1969
Stopclock in plastic case by W.G. Pye and Co. Ltd., Cambridge, c.1970 (not in working order) Stopclock in plastic case by W.G. Pye and Co. Ltd. 1950-1974