Rich:
I believe they are the factory grips that shipped with the gun. Per the Jinks letter, the gun shipped "with a red post front sight, white outline rear sight, target hammer, target trigger, blue finish, and
rosewood target grips." I believe that the grips were smooth rosewood target grips and that they were carved by the craftsmen that engraved the gun. The back of the grips are the black stamped stock circles consistent with grips of the late 1950s.
They are not perfect, but they are very nice.