LOCKS No's 29A & 29B
on Telephone No. 706 to stop outgoing dialled calls. 999 can still be
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: September 22, 2021