Folks, these grips might be from Altamont, but I am not sure. They look identical to Altamont's K frame round butt rosewood checkered grips except the top of the checkering border is a little different. Altamont shows the grips without medallions but say that S&W medallions can be ordered for an extra $10. Without medallions the grips retail for $38 plus shipping. I just took the grips out so they will be ready to ship and I took a look at them. There is only a large K stamped on the backs, no other markings.
Altamont supplies grips for certain Colt Mod O or 1911 variants. Maybe they supply the S&W Classic grips, too?