It is a 38 Double Action, 3rd Model, shipped somewhere in the late 1880s, and agree that neither engraving nor stocks are factory. 1/2" gold washed medallions ran from 1910 to 1920. Prior to that, the early gold medallions were smaller so measure yours carefully. The teens medallions were also dished. I am no expert on engraving, but what I try to look for is stylish professional looking engraving that looks better the closer you get, which is the opposite case for that gun. I cannot make out "rings" on the butt of those stocks, but they are very yellow, so could they be bone?
Sorry, but I would opine that revolver may not be worth half of what was quoted above. Stocks were most likely not even made for that revolver since they do not fit that well, plus there were over 550,000 of this model made. Rough rough distributor engraving does little for value. Buyer appeal for non-factory stocks and engraving on a standard 38 DA only go so far as novelty will take it.
If you like it, buy it, but do not expect any big returns down the road.