I have a Ruger Single-Six (stainless, unfluted cylinder, rosewood grips, 17 HMR) only 300 mfg.
Never even catalogued. I ordered it from, CDNN Liquidators - years ago for a 'song'.

I also got a new Single-Six, 22 Convertable from a friend pawnbroker - Mr. Money!

I kinda fell into the opportunity to buy both, and I kept them because I found the
Single-Action Revolver feels natural and shoots straight arrow - in spite of ME!