This is an unusual grip. It was on a 66-2 I bought. I liked the feel of the grip, but it must have been homemade. It did not fit another RB K frame I have. I believe it is oak. It has swelled side, and though it looks unusual, it feels really good in the hand. It probably needs fitting. Asking $15 shipped or looking for a Hoque J frame Monogrip in trade.
Steve
503-737-7135