This clock has a black bakelite case with a screw-on bezel and is wound by turning knob on case at the 4 o'clock position. The hands are adjusted by pressing and turning the knob simultaneously. The dial is marked with alternate luminous numerals and luminous hands (luminous paint no longer active). The back of the case bears the British 'king's' crown and the initials, "A.M." (Air Ministry). The dial is in signed, "8 DAY Mk.IIB - ER - 6A/1072 - 7917/43". Fitted with a good quality nickel plated movement, positively identified as being manufactured by Jaeger. Overall width of clock (not including winding stem) : 64mm. Nice condition. Recently serviced. Time keeping : good.