"Precision - Tube Master" Series 10-12, requires 110 v AC supply. Apparently, has faults, but could be restored. Mounted in wooden carry case. Serial No.16259. Case has a hinged lid and two metal clasps on the front, with a black plastic handle in the centre. The switch board is a silver metal plate with numerous black plastic switches. There are two rectangular windows at the switch boards base that display the testers readings. Tester has four paper manuals concealed
Precision/ tube master/ series 10-12/ tube and battery tester/ precision apparatus company, Inc., Glendale, L.I., N.Y., U.S.A Maker's Mark
16259 Serial Number
Precision Apparatus Company, Incorporated. 1955. Tube and Battery tester, 2002.106. The Museum of Transport and Technology (MOTAT).