LOCKS No. 46A
on Telephone No. 746 to stop outgoing dialled calls. 999 can still be
The Lock is supplied as a kit of parts (Kit No. 311A) and comes with two keys. The lock worked in conjunction with a Dial No. 28 which is also installed in the phone.
A replacement telephone is supplied which has a opening for the lock. The lock is fixed to the chassis.
Kit No. 331A comprises of:-
Diagram - N859.
Drawing - CD2739.
Lock in situ
Case removed showing chassis fixing
Last revised: January 18, 2023