Browse Items (3473 total)

One of two tubes have a spiral glass feature; presumed to have been acquired as a set with five others

Glass density bottle; etched onto bottle '25 Grammes, 60 F'; in custom-made black-painted tin; packed in cotton wool

Selenium rectifier with black cooling fins. Every fourth sheet has a hole in one corner while all other corners have been taken off. The central rod has screw terminals at either end.

modular valve unit (late 1950s?) Black aluminium case with rear connector and valves projecting and covered in screening cans. Counting unit Racal Eng. Ltd. Type no. CU 542 D Ser. No. N1681. 4 valves: 3 off 12AU7/ECC82; ECC82/12AU7

a wooden handle with brass rod and spindle fitting. A disc may be attached to the spindle and spun to create an optical illusion of movement

2 brass Morse code style switches and terminals mounted on a wooden base.

6 wooden plate holders with brass fixings. Numbers are inscribed

a wooden bell shaped dome. Internal circular socket fitting for shaft or handle

a brass axle with four needles attached to the centre in a swastika shape

broken shafted ivory handle, the orientation of the shaft suggests a winding handle