Sturm, Ruger & Co. Introduced its first single action revolver in June 1953. It was a six-shot.22 caliber called the “Single-Six”. Bill Ruger had recognized that, due to the popularity of the early 1950’s TV and movie westerns, a “cowboy type” gun should be desirable to the gun public. Looking at these two pages, it falls in between both of the serial histories. Urc complete control program. Ruger Super Single Six Serial Number History Ruger New Model Single Six Serial Number History (Had to remove links from post due to post count, but it's from the manuals page) I might have just not found the right model page I guess.

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Post subject:History of the old model Single Six revolver!

Single-Sixer

Joined: Tue Oct 30, 2007 1:39 pm
Posts: 117
Location: Arizona

This is an advance peek at a future article on this historic revolver. Hope you enjoy it.
John
Back in the late 1940s the United States, freshly recovered from World War Two, had a renewed and apparently insatiable love affair with the “old West.” The movies featured “westerns” with John Wayne, Gary Cooper, Roy Rogers, William Boyd, Gene Autry and many others in roles that glorified the days of the western frontier. In nearly all of these movies, and in similar portrayals on TV, the heroes wielded Colt single action revolvers. The public loved those cowboy sagas, and they loved those old cowboy guns. But strangely, in 1947, Colt’s Patent Firearms Manufacturing Company announced that it would not be resuming manufacture of its classic Single Action Army revolver. The machinery to make it had been dismantled and scrapped as Colt’s attended to the manufacture of other guns during WWII. Bill Ruger, president and CEO of the fledgling Sturm, Ruger & Company, saw this as an opportunity to step in and provide folks with the ability to purchase a Single Action Army look-alike revolver at a great price, and it could be chambered for the economical .22 Long Rifle cartridge.
Ruger broached the subject of a Colt look-alike .22 revolver with his patent attorneys, and they agreed that Colt no longer had patent rights on their classic single action. Thus, Ruger had a green light to begin development of a similar revolver. The nickname of the SAA was the “Peacemaker,” and it was realized that name was pretty much off limits. The name “Single Six” was chosen, and the resulting new gun accelerated the expansion of the Ruger firm.
While working as an engineer earlier at the Auto Ordnance company, Bill Ruger was introduced to the concept of investment casting, essentially a modern application of the ancient “lost wax” process used in jewelry making and in dental work. He initially worked with a jewelry company called Arwood, located in Brooklyn NY, to adapt that process to making the trigger and the hammer of the Single Six. At first that company told Ruger that making an investment cast frame for the new gun would be too much of a gamble. Then they relented to Ruger’s demands and attempted it. The first results were awful, with much of the production having to be scrapped. Finally getting things straightened out, Arwood successfully began the casting of the Single Six frame in Groton CT under the leadership of a man named Stan Terhune, who was rapidly becoming an expert in the technique. Terhune eventually came to work directly for Ruger and set up a Ruger investment casting shop in Newport, New Hampshire, where operations continue today. Arwood management continued to work amicably with Ruger and provided personnel to act as consultants.
Bill Ruger began to hint to the press that a .22 single action revolver was under development, and he and his engineers worked overtime to bring it to fruition. They designed the revolver with unbreakable coil springs to power the action, dispensing with the Colt system which used more fragile leaf springs. It was slightly reduced in size from the Colt product, but it used very similar lockwork and an “XR3” grip frame that was identical in size and shape to the time-honored grip of the Single Action Army. This grip frame was black anodized aluminum, and topped with black checkered hard rubber grips. The similarity to the Colt product was reflected in the “three screw” configuration. The aluminum grip frame was economically cast in one piece, unlike the Colt frame which was in two forged steel pieces. The barrels on these first guns were all 5 ½ inches in length. Splitting with Colt tradition, the loading gate on the gun was flat rather than rounded, and had a thumbnail notch in it to initiate opening. Operating exactly as its Colt predecessor, the gun was carried safely with only five rounds in the cylinder, the hammer resting on an empty chamber to prevent a negligent discharge. The satisfying “four clicks” heard when cocking was identical to the sound made by the old Colt.
Gun writer Elmer Keith had provided valuable input to Bill Ruger on single action design, and Ruger sent a prototype to both him and Major General Julian Hatcher at the NRA’s American Rifleman magazine for evaluation in 1952. On February 1, 1954, the factory had completed an initial run of 100 guns out of about 175 started. There were early problems with bluing on the chrome-molybdenum frames, and a number of guns were retained for bluing experiments. Production of 1000 guns was then in progress. In spite of Federal income taxes eating up about two-thirds of Ruger’s 1953 profit, the company was planning a new plant to manufacture the Single Six.
Ruger had begun advertising the Single Six in June of 1953, building up demand for the new gun well in advance of its availability to the public. The first catalog featuring the Single Six was shipped in December, 1953, but the guns did not hit the shelves until early 1954. Ruger had issued an apologetic letter about the delay in November, 1953. Demand for the $57.50 gun immediately far exceeded supply, and the new revolvers became wildly popular when first available. The very first guns had a non-serrated front sight. At around serial number 2000, the rear of the front sight was serrated, and continued to be through 1973 when the “old model” was discontinued. Depending on the amount of silicon in the cylinder frame, early bluing was erratic, and sometimes turned a plum color. These miscolored frames are now valued by collectors. Even more modern blued Ruger firearms are sometimes produced with varying color.
In October of 1955 the slot in the ejector housing was lengthened, to allow for its concurrent use on the then-new .357 Blackhawk revolver. In October of 1956, the small button on the ejector rod was replaced with a larger non-serrated button. In 1956 and 1957, lightweight aluminum-frame Single Sixes were offered. These are somewhat rare to find now. The revolver pictured here was manufactured in January, 1957, just two months before the flat loading gate was replaced with a rounded style similar to the old Colts. This change gave instant collector status to the older “flat gate” guns that are now prized when found. Around September, 1958, the ejector rod housing was modified again to incorporate a straight slot. New barrel lengths were offered around May of 1959, giving options of 4 5/8”, 6 ½”, 9 ½”, or the original 5 ½”. Until 1963, optional grip panels of stag or ivory were offered. Varnished walnut grips became available in 1956. All had the Ruger medallion. In the 1960-61 time period, the walnut grips became standard. Rosewood grips are occasionally encountered. Factory-engraved models were offered from time to time. Ruger advertised presentation cases for either one or two revolvers even before the guns were available The stunning popularity of Ruger’s single actions was a large factor in Colt deciding to re-introduce the original Single Action Army revolver in 1956.
In the summer of 1959, Single Sixes could be purchased with the cylinders chambered for the .22 Winchester Magnum Rimfire cartridge. Guns

Ruger Old Model Single Six Serial Number History