Good morning to all. im a new member here and a bit foggy on these threads to boot. Anyway, Been trolling about trying to find out some info on a single six that seems to have no origin. I ran the serial on the Ruger site and it came up empty. the closest it could find (after adding some zeros and a hyphen) was a synthetic 10-22. I am absolutely sure that this pistol looks nothing like my 10-22's so i thought i would add a pic to this post. as you can see, its a 3 screw model with a windage sight only. stamping on opposite side of pic reads "RUGER .22 CAL SINGLE SIX. What i am trying to find out is the Mfgr date and the possibility of giving it a bump up to the .22 WMR cylinder conversion. any help here would be appreciated.