Circa 1917 WWI Trench Watch, American made by the Crown Watch Company (owned by the Keystone Watch Case Company).
This is the BIGGEST American wrist watch ever made! It's a BEHEMOTH Size 12s measuring 53mm lug to lug and 47mm without the crown.
This was a factory cased wrist watch, this did NOT start off as a pocket watch, it's the real McCoy!
15 jewels, enamel RED 12 dial, skeleton hands. Still working on a stem issue with this watch but it is wearable for now.