I have about a dozen Marlin 60 variants but don't have one with a squirrel on the stock. I used to see them at gun shows all the time but they have all but disappeared.
I have 4 squirrel stocks.
1980-1981 vintage.
I also have a Model 30 in 30-30 with a deer stock.
I fear that Ruger will be killing off the accurate little Model 60 to help its 10-22. In general, I’ve found then to way outshoot the Ruger.
My testing has been informal, anecdotal and personal, and doesn’t prove a thing. But I’ve acquired 4 of the little .22s , and they’ve all been tackdrivers.
That said, the idea of a Micro-Groove barrel for the 10-22 really interests me. Barrelmaking has been the one art Ruger has yet to master,