Yes, it is a common New Model Single Six, catalog number NR9, that has undergone some Bubba work to strip the black anodizing off the aluminum grip frame and ejector rod housing. Ruger used aluminum alloy for most of the blue Single Six and Blackhawk grip frames from 1953 until the present, and then started using aluminum for the ejector rod housing starting in about 1964. The grips are also not original Ruger, and has been stated, they look like Jay Scott fake stag grips. If it were unmolested, it would be a $500 gun give or take. But with the modified grip frame, ERH, and aftermarket grips, it is worth whatever someone will offer (I would think around $400). The 9.5" barrel is less common than the 5.5" or 6.5" barrels, but far more than 500 were made. The Gun Digest may have been referencing the old model XR3 grip frame Single Six with the 9.5" barrel (model RSS9). That was probably made in about that quantity. Then the XR3-RED grip frame RSS9 and RSS9X convertibles were probably made in higher quantity, and even more of the New Model NR9s (which are still being made).