I just received this one. Not a US Navy 3"/50, not a US Army 3 in MK II M2. It looks like the Army 3in in the shoulder but is taller. It is also taller then the Navy 3"/50. My measurements: 76mm ( 3 in) X 600 mm. Headstsmping: " 3 IN MARK II, Gun MOD OF 98-02-18, AMM LOT, 1501, Lot 1379 25- F.P.S., small number 28, small crossed cannon flaming bomb,primer unreadable. Brass, neck has a few cracks. Pictured center, next to Army steel 3in and Navy 3in ( with projectile). WW1?
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