Bought a ruger single six for $150 and some power tools. The serial # is 21-40515 under right side cylinder. Under left side it says Ruger .22 CAL SINGLE SIX with logo. Barrel looks to be 6 1/2" and on top of barrel it says. STURM RUGER AND CO INC SOUTHPORT CONN USA. Grips are wooden with the logo on each side. It came in the original box. It has the 22LR and the 22 MAG cylinder. Just want to know when it was manufactured and if I made out OK on the deal. It is in top condition with just a few scratches on the left grip. Any info would be appreciated.