Here I have a circa WW l Time Sector clock, The F. Whilton model , dial signed Francis J. And by Seth Thomas Clock Co.Whilton Model / Time Sector Clock / U. Navy Bureau of Ordnance / Mark l No.
54 / Inspected JBS 1919 / Made by Seth Thomas Clock Co. I believe case is cast iron with hinged swing out cast brass bezel... Silvered brass dial measures 10" diameter with 12" bezel.Sweep second hand is started by depressing left outside push button, and stopped by depressing right button, which has a swing lever which is moved out of the way during operations. Similar to a conventional stopwatch or chronograph.
I found on Ancestry a Brookline city directory listing Francis Whilton as a watchmaker in 1919 - I assume he was awarded the Navy contract to modify Seth Thomas clocks for wartime need of a large wall mounted timing clock for specific operations.... I have found no other examples in my search for similar timepieces... Nice early clock of good size, quite heavy at 17 pounds! The item "RARE Seth Thomas US Navy Time Sector Clock BIG & Early" is in sale since Thursday, December 3, 2020. This item is in the category "Collectibles\Clocks\Antique (Pre-1930)\Wall".The seller is "willardz-tyme" and is located in Parkville, Maryland. This item can be shipped to United States.