A Seikosha aircraft clock with a small second hand at “12”and a turbable bezel with red marks for elapsed time. The dial is marked with the character for “time”. The aluminum case indicates a late production date.
Same type clock with a pre-war case of brass.
Figure 35 to 38, clockwise from top. Seikosha aircraft clock with central seconds, turnable bezel, and two colored elapsed time indicator marks. The dial is signed with “TOKI”, the case is of light metal, and the tag markings translate as “type 100 aviation clock no. “2481”.
The Oversized Aviator’s Watch