Grip Identification

[Pizza Bob]

Just purchased these grips - N-frame SB. Kind of a pig-in-a-poke - a couple things piqued my curiosity. 1) The inletting at the top of the grip with the round wooden circle; 2) A plugged, or otherwise lack of a screw hole on the offside; 3) The checkering pattern. It just seems that I've seen these grips, or others by the same maker, before. Anybody recognize these?

I've already looked at Badger and Eagle with no match.

Thanks.

Adios,

Pizza Bob