The front plate measures 6 wide. The movement is marked Chelsea Clock Co Boston 478297.The item "VINTAGE CHELSEA CLOCK CO BOSTON US NAVY BOAT SHIPS CLOCK MOVEMENT PARTS" is in sale since Sunday, October 18, 2020. This item is in the category "Collectibles\Clocks\Parts & Tools\Parts". The seller is "midwestestate" and is located in Chicago, Illinois. This item can be shipped worldwide.