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
 

 

 
BACK Home page BT/GPO Telephones Search the Site Glossary of Telecom Terminology Quick Find All Telephone Systems

Last revised: December 26, 2020

FM