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 Post Office. The movements are described in B 1311. CLOCK No. 88A |
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Last revised: January 16, 2025FM2 |