25. The clock Mk. IIA has a self-starting 36-hour movement which is enclosed in an aluminium alloy or a moulded material case having a brass or moulded material bezel, and is wound by clockwise rotation of the bezel. The hour and minute hands which are of the perforated type, are set by rotating the bezel which can be released from the winding mechanism by moving a spring-loaded lever, situated at the side of the case. The lever returns automatically to the winding position when released.
26. A dummy hour hand painted in red on the inside of the cover glass, which is in some instances of transparent synthetic material, can be set by rotating the bezel. A dummy minute hand, finished red, is also provided under the cover glass, and may be set by means of a knurled knob. A regulator is provided and is adjustable from the outside of the case. In some instances the clock is provided with a luminised dial and hands. In all other respects the clock Mk. IIA is similar to the clock Mk.II.
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