Interlocking switch socket
- Made:
- 1915-1930
Interlocking switch socket, which can only be switched on when the plug is in position. Pat.No.5879/15. No.4031. c.1925.
Interlocking switch socket, which can only be switched on when the plug is in position. Pat.No.5879/15. No.4031. c.1925.
