Outer box, Outer box open, Box, Box top open, Face, Dial, Movement, Angle view of movement, 2nd angle view, Potance closeup, Detent closeup, Escapement mount, Tub inside

Elgin Grade 600  Marine Chronometer. Elgin was the runner-up to Hamilton in the competition for the WWII military chronometer. A few Elgins were sold to the military for evaluation and the remainder were sold commercially. Supposedly a number were disposed of much later in kit form as "do it yourself" Marine Chronometers. The Elgin chronometer has a Guillaume balance with 4 arm integral form and a demountable escapement.

 Unfortunately the samples submitted to the Navy did not meet the specifications. However, as indicated by the Bu. Ships marking on this piece, some pieces must have been sold to the military.