Actually, it's a Colt....maybe I should've asked the Colt guys, but my Pre-29 example made me post here first :)
It's a 2.5" Diamondback from 1975.....but maybe, as you noted, they are meant to be non-glossy?
I've seen Target grips from the 4" and 6" Diamondback and they are more glossy. The...