Detector unit for Bomb locator, No 1 Mark 3; in original transit cases.
This field equipment detected and measured distortions in the earth's magnetic field for the purpose of locating bombs sub-surface and was issued from the later part of Second World War until the end of the 1960s. The No 1 Mark 3 was a post-war model (1950s and 1960s) and used widely by Royal Engineers units.
Detector unit of white-metal, with black caps at each end and with electrical cord emerging from one end. In wooden transit case, painted green. On the inside of the hinged lid is stencilled "ZE00002".