LOCKS No. 29
Used on Telephone No. 706 to stop outgoing dialled calls. 999 can still be dialled.
The Lock is supplied separately and comes with two keys. The lock worked in conjunction with a Dial No. 28 which is also installed in the phone.
Two holes are drilled in the telephone case and a template is supplied
for this purpose.
Lock in situ
Template in position ready for the two holes to be drilled
Last revised: December 26, 2020