Venner Ven-O-Set Bayonet Lamp Timer
This video features the Ven-O-Set, a 'miniature' mechanical timer which has a bayonet plug and socket. Intended to be installed in a ceiling or table lamp to switch it on and off automatically once per day.
The Video
This example from 1962 includes the original box and instructions.
As this must be fitted into a bayonet light fitting and can control only a single lamp, this was a very niche limited use product even when new.
Probably only used with a ceiling light fixture, as for desk or table lamps the far more common timers with a BS1363 plug and socket could be used, those also having applications for other appliances such as heaters.
Although miniature by 1962 standards, today this is a ridiculously large device to just turn a single light on and off.
