This is a customized old model Single Six from 1957. It has not been converted to the transfer bar action, but it is certainly not all original either. The frame has been either case colored or actually case hardened. The sights are aftermarket adjustable style. And the grips are real stag aftermarket grips. There was a guy on this forum years ago who collected old, fixed sight Rugers that had Micro adjustable sights added, and I suspect that he would have snapped this one up in spite of the sights not being the Micro brand. But sadly, he passed away a few years before I found this one for him several years ago. I put it away when I learned that and just found it again while digging deep in the safe. There are a few patches of missing anodizing around the trigger guard as shown in the last pic, but otherwise it seems to be in very nice condition. The grips themselves should be worth about $300. A very unique piece that would look good in a display of older guns showing non-factory upgrades. The pictures don't do the case colors justice, it is very well done.
SPF $700 shipped FFL to FFL (sorry, no C&R due to USPS regulations)
SPF $700 shipped FFL to FFL (sorry, no C&R due to USPS regulations)