I actually contacted Choate and they replied that it was not one of their stocks. The guy that's selling the stock states it was one of only 200 made for the Ruger 10-22??
He has no other info on it and he states the stock has no markings or name on it.
I have 2 of the 10-22's with the boat paddle (aka skeleton stock). 1 is still new in the box that I will give to my son one day. I love these rifles and also have a collection of the M77's with them. I also have an extra 77/22 that I would sell if anyone on here is interested.