It's a .455 Hand Ejector (First Model,) with a S/N of 328X; putting its DOB somewhere in 1915. Sadly, it's been been converted to fire .45 ACP with moon clips, or .45 Auto Rim (the recoil shield has been milled, but the cylinders remain untouched.) It's also a military model, and all the military markings are still intact. Lockup is typical S&W. There is no end-shake, no play in the cylinder, nothing. Double-action pull is good and smooth. Single-action is firm, and the trigger break is very clean. Serial number. A number of reissue stamps. I wonder at their significance. Apparently, proofing one chamber just wasn't enough . . . and look at that mirror finish. Good finish, showing quite a bit of honest wear. Now time to get some .45 Auto Rim brass (or a couple of moon clips) and work up some .455-equivalent loads. I don't plan to abuse it with standard .45 ACP loads. Though, since someone in the past already decided to negate its collector's value (and stamp that 'CAL. 45 S.W.' on the barrel,) I may just have the cylinder re-chambered for .45 Colt.