Moving-coil thermocouple ammeter serial no.58732
Electricity and Magnetism
1941
Moving-coil thermocouple ammeter serial no.58732, by Sangamo Weston Ltd., Enfield, Middx, Eng., Marked A.E. Amps and scaled 0-3.5, also marked AM (Air Ministry) and dated 1941, in 2 inch dia. flush-mounting case