I don't know how common or uncommon they are- I haven't ever seen another one. I have one that I bought from Davidson's in about 1991? or so with the goncalo alves wood inserts. It is a very nice rifle and is accurate too. It is one of those rifles that would be near the last of any that I would part with. Ruger made a more recent run of the M77 7.62x39s also. I will try and get a pix up. TnTnTn
Here is my blued model in 7mm-08. I have posted pics of this in the past. Still unfired...I need to do something about that. Even tried to sell it before. Don't know what I was thinking...glad nobody was interested in it!!
The walnut panels were an add on though and originally it came with the black inserts. I have seen the stainless and walnut insert models before and they are a sharp looking rig.