CLOCK No. 4A & 4B


P.O. ENGINEERING DEPT
ENGINEERING INSTRUCTIONS
MISCELLANEOUS
TIME
B 1329
Issue 2, 29.12.49

ELECTRICAL CLOCKS - IMPULSE TYPE
Clock No. 4A

1. Description
Clock No. 4A, which supersedes Clock No. 4, is a 12 inch, wall-type clock for general purposes. It is fitted with a movement as described in B1311 and is operated by half-minute impulses. It has an octagonal moulded synthetic-resin case, and the general appearance is shown to the right. The oases are constructed on substantial lines, but synthetic-resin mouldings have naturally less resistance to shock than the more conventional wooden cases; care should therefore be exercised in handling them.

2. Earlier models of Clocks No. 4A are fitted with circular wooden cases, mahogany finished. The circular type clocks will continue to be supplied as long as they are available.

3. Replacement
In the event of breakage of the case, the complete clock should be exchanged under the maintenance-exchange procedure.

Over-all diameter - l8in.
Over-all width - 16.75in
Diameter of dial - 12in.
Depth (back to front) - 3.75in.

Superseded by Clock No. 64A

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Last revised: February 07, 2011

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