mine came new with the smooth wood gripsKevinHee-
Besides the different sights, your gun has Pachmayr grips. Original grips were Uncle Mike's. I made this change on my guns, too, although the Uncle Mike's are also a good grip.
mine came new with the smooth wood grips
Smooth target wood grips were on it when I bought it new , I put the rubber ones on for CCMagna grips, or target? You can see smooth target grips in the pic of the gun in box, with Uncle Mike's on the gun.
Someone probably swapped grips, but with S&W, anything is possible.
BTW, both flash chromed and color case hardened hammers and triggers are found on this model. I've owned both.
60-4 with Checkered Target grips