Britains boxed military equipment with sound Locator, model no. 1638 (3), one an earlier box type with yellow label inscribed 'A.A. Units of the British Army' (locator has one tripod leg detached); also height Finder, model no. 1729 (2), one an earlier box type with green label, the other with repaired tripod; plus range Finder, model No.1639; each model has hollow cast lead operator, the sound Locator operators having articulated arms; c.1950s-early 1960s, some box damage, largest box size 8.5 x 7 x 4 cm. (6)