You have wood grip panels so it could also be an RSS5W. Either way it would be a pretty scarce example and this is one time it would be a good idea to contact Ruger customer service and request a letter that would nail down exactly what model you have and what year it was shipped. It may have been shipped originally as an RSS5W (non-convertible) and the magnum cylinder was fitted later.
This was fairly common back in that era and something the factory was willing to do then for a modest fee thereby giving the Single Six owner the convertible option.Īpparently that block of duplicate serial number Single Sixes were used in 1968 to produce both convertible and 22LR only models. The most rare would be an RSS5W but the RSS5X would be pretty scarce too. The excellent condition of your example make me suspect the previous owner knew it was rather scarce and kept it in pristine condition.