Welcome (8 1/2 years from registering)!
They are factory and are the later (flat sided) variation of the RB Combat stocks. At that time they were likely Goncalo Alves but these are more brown in color than typical for that wood species. The model of 1988 was made for several years so these might be original to the gun.
The model of 1988 was made for several years so these might be original to the gun.
They discontinued the washers at some point. I believe it was sometime in the mid-1980's. S&W later supplied Combat stocks like these without medallions.Didn't the factory combat stocks use metal washers behind the medallions?
Adios,
Pizza Bob