Skeleton M77 MarkII

I have a M77 mark II skeleton stock 22-250. It is in the blued action and barrel, not stainless steel. I was wondering more about numbers that were made, and then possibly a value. I don't really ever remember seeing another one. Have seen several 22-250 in stainless, but the blued are usually in 7.62x39. I think the blued versions were made for Davidsons, but im not sure. I also was told it was a very limited run with 22-250 being the rarest. If anyone could confirm anything or correct any of these statements I would greatly appreciate it.

As far as I know, Davidson's only ever received 10 of those. If your gun is outside the 788-17097 to 788-17504 serial number range than they probably received more, but....???
It had a Ruger model number of 7917
Chet15

Not to hijack the thread but I would like to know some info on these also if possible. I have one blue in 300 win mag are these rare or common? Thanks everyone.

It actually starts out 789