Given it is marked ".32 Winchester" as opposed to .32 WCF or .32-20 it way older. The grips are some homemade concoction. The assembly number means next to nothing. The one on the butt counts but the cylinder and barrel likely bear that number. The patent dates might help. It's a pre-WWI gun (likely). A detailed inspection of the barrel is always prudent with .32-20's. There were in this era blackpowder through high velocity rifle only loadings. The popularity of the caliber fell rapidly after WWI. Sentimental/legacy value would far outweigh any economic one. Factory ammo is available but pricey. Whether it is a 1902 or 1905 model the serial will reveal.