Well, it won't fit. The ring is to small, even if I took off the flash hider. BUT I did find (OK remembered after I checked) about it. It has S A above a flaming cannon ball and under the ball is the year 1913. On the other side I THINK the serial number is 55 something or other, putting it in the 55000 range. SO, in 1913, with WWI starting in 1914, Grandpa would have been 18 so I guess it was WWI and NOT WWII for him. In WWII, so in 1941 Grandpa would have been 45. Yeah, it had to have been WWI.