GPO Buzzer 829

GPO Buzzer 829 No 18A 234 7D Wooden base with pressed one piece black steel cover, screw terminals, two 7.5 ohm coils working UK

Used on Cordless Switchboards and Units, Transfer, Intercom No 1A (HES)

for more information see:

http://www.britishtelephones.com/buzz20.htm