CLOCK No. 84 | |||||||
| 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. 84A |
|||||||
Last revised: February 07, 2011FM2 |