I think you have a Model 3 Japanese that was converted from the Model 3 Frontier. The Frontier was made in .44-40 to compete with the Colt SAA but when they didn't sell, many were converted to .44 Russian and sold to Japan, which already used S&W revolvers in that caliber. Your serial number is on the list of conversions published in Smith & Wesson - 1857-1945 by Neal and Jinks. There would also be a standard Model 3 with the same number but yours looks like it has the hook extractor.
To double check, look at the front of the hinge area and see if the center part has what looks like gear teeth or if it is smooth. If it is smooth, you definitely have the converted Frontier model. Just to double check, the cylinder should measure 1 9/16" long.
Before discussing value, I need much better pictures to judge condition. Dark blurry pics may do to identify a gun, but they won't do when trying to assess a value.
Jim