CLOCK No. 68
|PO ENGINEERING INSTRUCTIONS
Issue 5, Oct 1970
CLASS A (PULSE) CLOCKS
This is one of the standard half minute pulse clocks at present used by the PO. The movements are described in B 1311.
CLOCK No. 68A
Superseded by Clock No. 74A with Bracket, Clock No. 74.
Drawing No. P/T 177.
Last revised: February 07, 2011