Round-pin electric socket, manufactured by Ward & Goldstone, England, 1952 Ward & Goldstone round-pin electric socket 1952
Round-pin electric socket, manufactured by MK Electric Ltd, England, 1934 MK Electric round-pin electric socket 1934
'G.E.C.' 15A 2-pin switch-socket with porcelain base and brass cover. c.1930. 'G.E.C.' 15A 2-pin switch-socket circa 1930
Two plug-in coil sockets with provision for varying the coupling between the coils Two plug-in coil sockets