US Signal Corps Test Set 1-51 (Cable Repairman's). By Western Electric. Cased, approximately 30 x 16 x 27cm. Designed to be used for locating faults in short lengths of non-loaded telephone cable. The test set may be used in locating grounds, shorts, crosses, split pairs, and wet spots. It is comprised of a tone unit, an exploring coil, a telephone receiver and cord, and a plug for connecting the receiver cord to the exploring coil. The test set is housed in a wooden case with an adjustable webbing hand/shoulder strap. The inside of the case is divided into three compartments, one for housing the tone unit, one for the batteries, and one for the exploring coil, cord, plug and receiver. Overall condition appears to be very good but the batteries are absent and the headphones (HS-16A by Trimm Inc. of Chicago), are not the same as those illustrated in the War Department Technical Manual (TM11-379, September 1943). This 28 page booklet describes the test unit and gives full installation and operation instructions. One page gives details about not letting the enemy use or salvage the equipment and goes on to give methods of destruction including fire, smashing (axe, hammer, crowbar, pickaxe), explosives (firearms, grenades, TNT). 'Destroy Everything'.... An interesting set that would have been vital for maintaining communication lines on the battlefield. This item is rather heavy so postage will be relatively high. Stock code M25118.