Ships Chronometer, Longines gimbaled Deck Watch mounting box. The box was made in the US by Shipsclock Cabinetry. The box is made of Honduran Mahogany and is 6" X 6" X 4" out side. The distance between the shoulders of the pivot screws is 3 & 3/8". This is the last one of these from Shipsclock Cabinetry. Please feel free to ask any questions or request additional pictures.