I knew they weren't factory but the high quality of the checkering made me ask on the Forum. Apparently, Shaw's was at least somewhat known in the gun world. I wouldn't be surprised if they didn't make the grips and not just checker someone else's grips. Probably never know.
I'd assume that their principal business was checkering other people's stocks. Had they manufactured significant numbers of their own stocks, the Shaw name would likely have been better known.
I bought these grips on fleabay yesterday ... I like the extra length of the grips, and the closed section at the top of the back strap. I'll be stripping the varnish, and applying an oil finish.