Legal, I was remiss in not congratulating you on your find. Way to go, digging out what you're looking for! And thanks for sharing them on the forum. I'm sure the 61 owners will be interested in seeing them. Hope you'll post photos of them on the 61.

It would be interesting to know from whence they came. The wood and finish looks very similar to the target grips on the 2206 TGT. Those were made by Herrett (Gun stocks by Herrett's Stocks, Inc.) and perhaps somebody else I haven't been able to determine.
Would you post photos of the back of those grips?