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Portable grey and black unit with a control knob and socket on the side and a reader dial with a needle and markings in degrees celsius from -30 to 20 on the front. The unit is used to measure the temperature of items being probed. The thermometer is held in a black synthetic carrying case. Brief instructions and the name of the device, 'EDALE THERMISTOR THERMOMETER MODEL' are inscribed on a sticker inside the case and a further inscription 'L.S. HIGGS Q.C.S. DEPT J. SAINSBURY BASINGSTOKE DEPOT' is present on a white sticker on the outside.