For sale is a used and now discontinued Hamilton Khaki Navy Frogman titanium watch, model H774150, with a distinct crown system. The outer protective crown screws off to reveal a smaller crown used to set the time and date. This is a unique and very cool watch. I am not the original owner and do not know the age of the watch, but it is in overall good to very good condition with some hairline scratches on the high-polished bezel. The rest of the case appears bead blasted. The watch comes on an aftermarket canvas strap with no box or papers. Dimensions by my measurement: 40mm diameter, 48.8 lug-to-lug, 12.2mm thickness, and 20mm lug width. For more information and video on a slightly different variation of this watch, visit https://www.youtube.com/watch?v=KwtllnvPjAo. The reviewer (Random Rob) reports that the watch has an ETA 2895-2 movement. Reduced Price is $525; Venmo preferred for payment. No trades, please.