You have a Safety " Cycle " Automatic ( automatic means ejection ) Revolver, 3rd Model, 2nd Variation. Serial number dates it to 1915. In 1915 serial numbers G0001-G17100 were used. Made for modern ammunition. It is not unusual to find these guns in new condition, they were bought for home protection, placed in a shoebox with a box of ammo, at the top of the closet and forgotten. Hope that helps
