[ithacaartist]

The hot pin test will tell. Heat a pin red hot. Briefly press the tip into an appropriate spot on the back side's surface. Bakelite might give a whiff of hot electrical stuff, but the pin will melt the plastic and sink in if you push. That's the diff.

With other plastic copies of German or VoPo Bakelite grips, the mold makers forgo the tapped holes on the back, or at least the threads, particularly on the cheapest ones. One should be able to turn a grip screw into these holes. Without seeing pics, the "dimples" remind me of this. If the Russian Bakelite grips have threaded holes ordinarily, this might also be a clue. I have, however, never had any in-hand, whether real or repro, and I cannot say.