HAMILTON ELGIN 35700 ELAPSED TIME CLOCK. Complicated mechanical clock produced under contract for WWII bomber aircraft; clock features two chronographs, displays 24-hour time, running seconds, length of trip (up to 12 hours), 60 minute center seconds chronograph and Civil Date. - 3 1/2 in. diam.; dial diam. 2 3/4 in. Estimate $400-800
