I edited out the last two digits, if you look carefully you can see an orange square where I edited out the last two digits. You can see it in the photo of the end of the box.

Or at least it was somewhere for a long time.

If it means anything, the red cloth bag that holds the 'extra' cylinder is pretty sooty, so it was probably with the gun for a long time. I take that to mean it was probably done at the same time by the same person. The handwriting appears to be identical on both cylinders too.

Looks to be scribed by hand with a vibrating engraving pencil. I had to clean them off a bit to see it, but it is there. Yes, both cylinders are marked on their front faces with the last three digits of the SN. I think I'm spoiled, I dunno if I will buy anymore new Rugers. I have about 1/2 dozen three screws now, and there is a lot more to them than I originally thought. In your s/n range both cylinders would have the last 3 digits of the s/n scratched (engraved on the front face.) Does your gun have the eagle logo on the barrel? Only 2 known as shipping w/mag cyl only with those features and frames marked as yours is. Your gun has an XR3-RED grip frame and alloy ER housing, and looks like it's not marked Magnum on the frame. 'And the other question is, if this gun sold specifically as the 'magnum' model, and not a convertible, does that mean it originally shipped with just the magnum cylinder? Or did it ship with both the LR and the Magnum cylinder?' 'Or did it ship with both the LR and the Magnum cylinder?'ĭUE TO THE LACK OF THE MAG MARKED FRAME, YOURS MOST LIKELY SHIPPED AS A CONVERTIBLE WITH BOTH CYLS DEPENDING ON WHAT YOU FIND SCRATCHED ON THE FRONT OF THE CYLS. AND GRIPS COULD HAVE BEEN UPGRADED TO WALNUT AS WELL. DOES YOUR BOX HAVE THE SERIAL # OF YOUR GUN WRITTEN ON IT SOMEWHERE?īOX MARKINGS ARE NOT FULLPROOF. BUT YOUR GUN ALSO HAS WALNUT GRIPS WHICH MEANS IT SHOULD HAVE A W IN THE CAT.

YOUR BOX INDICATES IT DID BECAUSE THERE IS NO X AT THE END OF THE CAT. 'And the other question is, if this gun sold specifically as the 'magnum' model, and not a convertible, does that mean it originally shipped with just the magnum cylinder?' 'When I look in Ruger and his Guns, the tables in the back list my Serial Number (3725XX) as falling in the 'Magnum' model, and if I am reading it right, this gun was make in 1963.

Ruger 3 screw single six serial numbers