|P.O. ENGINEERING DEPT
Issue 2, 29.12.49
ELECTRICAL CLOCKS - IMPULSE TYPE
Clock No. 4A
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.
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Superseded by Clock No. 64A