Cooker switch-fuse, 30 amp, "Botrade", ironclad with wooden round-pin plug by MK Electric, issued by Preston Corporation Electricity Department, 1920s Cooker switch-fuse
Bakelite plug and socket with original box. When the plug is removed the cover of the socket is turned by a spring to conceal the contacts, c.1920 Bakelite plug and socket with original box 1920
Plug and switched socket by Saxonor, patent no.245572, switch turned on by pushing plug up, and plug may be released by pressing the button Plug and switched socket by Saxonor
