Welcome to the Forum ! We need the serial number to verify the gun. If all is correct, you will find it on the butt, on the bottom of the barrel latch, between the "ears" of the rear of the barrel and on the rear of the cylinder. If the stocks are original , the serial number may be seen on the back side of the right panel. These numbers should all match, unless parts have been replaced . The cylinder should measure 1 & 7/16ths in. long to be .44S&W Russian caliber. These guns are considered antiques by the BATF as all frames were made before 1898, even though some guns were assembled & sold up the WW1 era. Your specimen looks to be in very good condition. From your serial number I may be able to tell you the manufacturing date. Ed