1942 US NAVY MARK 1 DECK CLOCK BULKHEAD MOUNT - SETH THOMAS - # N 21231. This Listing is for a Seth Thomas US Navy Mark 1 Deck Clock Bulkhead Mount Case with Porthole Thumbscrew and Hinged Pin Model Number N 21231.1942 WWII Era Clock - Dated 1942 - Made in the USA The Original Wing Key is included Note that the Clock Face Numerals and the Tips of the Hands on Clocks of this era were typically painted with a Radium based paint. Clock Dimensions: Rear Case Diameter (Side-to-Side): 8.37" Rear Case Diameter (Top-to-Bottom): 7.25" Front Case Diameter: 6.75" Front Glass Diameter: 5.75" Case Depth: 4.0. Thank you for Looking & Have a Great Day! The item "SETH THOMAS US NAVY MARK 1 DECK CLOCK BULKHEAD MNT #21231, 6.75 FACE, WWII 1942" is in sale since Thursday, June 25, 2020. This item is in the category "Antiques\Maritime\Maritime Clocks". The seller is "catnip56" and is located in The Dalles, Oregon. This item can be shipped worldwide.