The factory did put original ivory stocks on their revolvers, circa 1800- 1910, that I know of, as the records for most S&Ws of that period reflect what guns, by serial number, were manufactured with ivory stocks ( also other materials, like pearl, walnut, hard rubber, etc. ) I've had several pairs of carved ivory stock over the yrs that were carved exactly like the hard rubber type stocks ( cross hatched with the S&W logo in the circle ) but they didn't come to me with the gun, so I don't know if they were aftermarket or factory. The records I have for small frame S&Ws, where ivory is indicated, do not say plain or carved - just " ivory " and the serial number & model. A very small perentage of total production is listed as " ivory " stocked and mostly in the lower serial numbers early in production. For any of you who may have a Revolving Rifle with an ivory stock, you're out of luck as the records I have for those guns do not indicate what the stock material was, so I think probably all were walnut and any with ivory may be an aftermarket addition. Ed