Vintage Mark-1 U. S. Navy 1941 Brass Boat Clock Military Seth Thomas Ship Clock May 26, 2020 vintage NAVY BRASS BOAT CLOCK. The item “VINTAGE MARK-1 U. S. NAVY 1941 BRASS BOAT CLOCK MILITARY SETH THOMAS SHIP CLOCK” is in sale since Tuesday, February 25, 2020. This item is in the category ...