Just as a little more information, the Model 28 was intended to be a lower priced "economy" version of the Model 27, which is essentially identical to the Model 28, which has a higher level of finish and workmanship, and also a higher price to match. In that more utilitarian form, the Model 28 gave S&W a much better competitive pricing position in the law enforcement market and met the need for less expensive but reliable service revolvers. Therefore, factory plating, as it adds additional cost, would not have been considered for this particular model. Of course, that would not have prevented an earlier owner from embellishing it by having it nickel plated, simply because he wanted to. As noted, a sure sign of aftermarket plating on a S&W is the presence of a plated hammer and trigger, as S&W did not plate those parts. Such modifications which reduce value to a collector are unfortunately very common in the world of guns, and revolvers left in their original condition will always be worth more than those embellished later (with a few exceptions). At least you know all this from the experts here. Good luck on selling it - it is a nice revolver and will shoot well for its next owner.