The back measures 7 5/8 wide. The case is marked Chelsea Clock Co. The movement is marked Chelsea Clock Co Boston 352546. The movement appears to tick.
The clock is missing the dial and hands. The item "VINTAGE CHELSEA CLOCK CO BOSTON US NAVY BOAT SHIPS CLOCK PARTS REPAIR" is in sale since Tuesday, September 13, 2016. This item is in the category "Antiques\Maritime\Clocks". The seller is "midwestestate" and is located in Chicago, Illinois. This item can be shipped worldwide.