The right side under the cylinder the serial number is 21-40515. The left side says RUGER.22 CAL. SINGLE-SIX with the Ruger logo and an R inside a circle. The barrel appears to be 61/2' and on top it reads STURM, RUGER & CO., INC.

• Ruger Blackhawk Dates Of Manufacture
• Ruger New Model Single Six
• Ruger Single Six Serial Number 61

1. Old model ruger single six for sale, old model ruger single six with serial number starting with 43, ruger single six, ruger single six action revolvers serial # look up, ruger single six forum, ruger single six identification, ruger single six old model, ruger single six serial number lookup, ruger single six serial number starts with 60, ruger single six serial numbers.
2. By Phantom013 » Sun Jun 05, 2016 2:49 pm. I am a newbie, planning to purchase an old model Single Six, serial no. I am confused by the Ruger website production history page because I am told by the seller that it is caliber.22 long rifle but I don't see that number included there.
3. That was the same model Ruger Single Six that I had so many years ago. Always liked the look of the 4 5/8th' barrel. Sold the Ruger when I got hooked on semi-autos and the allure of their 10 round capacity and their quick and easy mag reloads.

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Post subject:Unusual Serial Number for OM Single-Six
Blackhawk Joined: Tue Oct 24, 2006 1:01 am Posts: 763 Location: Virginia, USA	I just picked up an unconverted OM Super Single-Six, drift adjustable rear sight, 6.5' barrel, has both 22 Magnum and LR cylinders, black eagle grips of course, and it's actually in pretty decent shape overall, but I got it for a shooter at a good shooter price. (I know, I know, obligatory pics are coming once I get the camera batteries recharged). After checking the Ruger website, the serial number sequence puts year of manufacture in 1965. The manual in the box has a copyright date of 1965 so that seemed about right for where I guessed it might be. But, it has a 'D' stamped preceding the serial number. It appears to be a factory type stamping but is a heavier indentation than the numbers. For the more knowledgeable Ruger serial number experts here, does the 'D' denote anything special? Trying to search for 'D stamped serial number' yields a bunch of hits!
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Posted: Thu Mar 22, 2012 5:15 pm
Blackhawk Joined: Tue Oct 24, 2006 1:01 am Posts: 763 Location: Virginia, USA	Never mind, found it! Google can work sometimes! It indicates a 'Duplicate' serial number. I should have known that. It is in the 504XXX range.
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Posted: Thu Mar 22, 2012 7:50 pm
Hunter Joined: Thu Jan 10, 2008 1:57 pm Posts: 2762 Location: Vinton, VA	It's a Single-Six in the Super Single-Six serial number range. Your gun was probably made around 1968, a call to Ruger will give you a shipping date. The Super Single-Six that has the same serial number that your gun has, minus the 'D' was made in 1965. Ruger has the policy of setting aside serial number blocks for different model guns. They did the same thing with the Standard Autos and the MK-I. They did he same thing with the Single-Six and the Light Weight Single-Sixs. The Single-Six and the Mag. only Single-Six. And the Single-Six like yours and the Super Single-Six. The super Single Six was assigned the serial number range 400,000 only 5 were made with that serial number 400,001-400,005 and the 500,000 range. When the Single Six got to 499,999 it went to 500,000. This was in 1968 and the factory forgot that in 1965 they had serial numbered Super Single Sixes in that range. After they had serial numbered a few thousand, someone at the factory caught the mistake and had a 'D' put on the serial number. That is why your gun has the 'D' stamped as part of the serial number. This also happened when they serial numbered MK-I in the 300,000 serial number range, and when the Standard got to 299,999 they continued numbering the Standard guns in the 300,000 range. Some of the guns got out without the 'D'. The MK-I will have the small size serial numbers and the Standard Autos will have the large size serial numbers. Isn't Ruger collection fun!!!
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Posted: Fri Mar 23, 2012 6:29 am
Blackhawk Joined: Tue Oct 24, 2006 1:01 am Posts: 763 Location: Virginia, USA	Thanks for the info. Yes, I found this older thread that had quite a bit of info about the 500xxx range of Single-Sixes.: http://www.rugerforum.com/phpBB/viewtopic.php?t=53546&postdays=0&postorder=asc&start=0&sid=90e7401c67ef7e9c04b6b7722b6d0fd3 It does appear to be a RSS5W with both cylinders. The 22LR cylinder is not scratched or stamped with the last 3 digits of the s/n.
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Posted: Sun Mar 25, 2012 1:43 pm
Ruger Guru Joined: Mon Jan 22, 2001 2:01 am Posts: 9732 Location: Dawson, Iowa	Thanks for the info. Yes, I found this older thread that had quite a bit of info about the 500xxx range of Single-Sixes.: http://www.rugerforum.com/phpBB/viewtopic.php?t=53546&postdays=0&postorder=asc&start=0&sid=90e7401c67ef7e9c04b6b7722b6d0fd3 It does appear to be a RSS5W with both cylinders. The 22LR cylinder is not scratched or stamped with the last 3 digits of the s/n. Yes, you'll want to call the factory to see if it letters as an RSS5W or RSS5X. The X signifies convertible. If it comes back as RSS5W then it would be the first 'D' RSS5W known in that range. Please PM me if it does come out as RSS5W, as I've been searching for the existance of that one for about 30 years now. Chet15
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Posted: Sun Mar 25, 2012 7:49 pm
Site Admin Joined: Mon Jun 18, 2001 1:01 am Posts: 30942 Location: Star Valley, WY
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Post subject:
Ruger Guru Joined: Mon Jan 22, 2001 2:01 am Posts: 9732 Location: Dawson, Iowa	I've always suspected there were some RSS5W in the D50xxxx range, but haven't confirmed that one yet. Up to a few hundred of the earliest guns in that duplicated 50xxxx range were shipped out without getting the 'D' stamp and the two I know of are RSS5W, but so far no 'D' marked RSS5W in that range. Chet15
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Posted: Mon Mar 26, 2012 9:11 am
Blackhawk Joined: Tue Oct 24, 2006 1:01 am Posts: 763 Location: Virginia, USA	Yes, you'll want to call the factory to see if it letters as an RSS5W or RSS5X. The X signifies convertible. If it comes back as RSS5W then it would be the first 'D' RSS5W known in that range. Please PM me if it does come out as RSS5W, as I've been searching for the existance of that one for about 30 years now. Chet15 Will do. I am curious myself. I'll try to take some pics to post up today.
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Posted: Mon Mar 26, 2012 9:49 am
Blackhawk Joined: Tue Oct 24, 2006 1:01 am Posts: 763 Location: Virginia, USA	Just got a call back from Ruger (and for the record, man, can they deliver quick customer service or what!) It turns out that it is a RSS5X, shipped June, 1968, with both cylinders. So unfortunately the search for the elusive 5W in that range continues. Still, I am quite happy with this one. How could one *not* be happy with an OM Single-Six in decent shape!
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Posted: Mon Mar 26, 2012 10:29 pm
Hunter Joined: Mon Jan 09, 2012 7:57 pm Posts: 3656 Location: Casa Grande, Arizona	I have D503695, which was an RSSMX that also shipped in June '68 according to Ruger. _________________ Actions Reveal Character #iwillnotcomplyfu 'To learn who rules over you, simply find out who you are not allowed to criticize.' - Voltaire 'Government is not reason; it is not eloquent; it is force. Like fire, it is a dangerous servant and a fearful master.' - George Washington Μολὼν λάβε Member RCA, RENE, NRA
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Posted: Tue Mar 27, 2012 8:40 am
Blackhawk Joined: Tue Oct 24, 2006 1:01 am Posts: 763 Location: Virginia, USA	Pics. In retrospect, this revolver must be a RSSMX instead of a RSS5X. The barrel length would be incorrect otherwise. I still feel I got a decent deal for $275, even with the beat up box and manual.
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[ 11 posts ]

RUGEROLDMODELSINGLE-SIX “MAGNUM ONLY” REVOLVERS

Ruger Blackhawk Dates Of Manufacture

PRODUCED1959 - 1962

Ruger New Model Single Six

GENERALOVERVIEW

The .22 Magnum cartridge was introduced by Winchester in 1959.Ruger introduced its Single-Six single action revolver in .22 “Magnum Only” around June of that same year.

The Magnum guns had 6-1/2 inch barrels, round loading gates, checkered black hard rubber grips, and no firing pin groove in the rear of the cylinder.They were roll-marked“RUGER SINGLE-SIX WIN. .22 RF MAG. CAL” in two lines on the left side of the cylinder frame.In early 1960 the Magnum Only guns were also made available with varnished walnut grip panels.

These Magnum Only guns were put in a special serial number range of their own beginning with 300000 and ending at 340XXX.About March 1961 Ruger began to produce these Magnum Only marked guns with an extra .22 caliber cylinder.The extra cylinder, the .22 caliber in this case, had the last three digits of the gun’s serial number stamped on its front face, close to the cylinder base pin hole.The idea of producing these dual cylinder guns or a “convertible” came from customers requesting that Ruger retrofit their “Magnum Only” single-cylinder guns with a .22 caliber cylinder or their .22 caliber only single-cylinder guns with a Magnum cylinder.

The “Magnum Only” marked guns came in a black and red box with a yellow wreath on top like the standard Single-Six but designated with Cat. No.“RSSM” on the box end labeling.

The production of these “Magnum Only” Single-Sixes ended sometime in August – September 1962.The 6-1/2” barrel length soon was made available in the standard “Single-Six .22Caliber/.22 Magnum Convertible” model.The boxes for these 6-1/2 inch barrel convertibles continued to be marked with the catalog number “RSSM”, not RSS6, throughout the Old Model Single-Six production that ended in 1972.