CLOCK No. 88 | |||||||
PO ENGINEERING INSTRUCTIONS MISCELLANEOUS TIME B 1321 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. 88A |
|||||||
Last revised: November 05, 2022FM2 |