Is that a Super Blackhawk, or a Blackhawk? I was aware of the special run Buckeye Special in those chamberings. It was on the Blackhawk frame. They also did a 32-20 / 32 H&R Mag Buckeye and I have one of those.A Ruger Super Black Hawk Special run 38-40 Winchester Convertable with 10mm cylinder.
1st Ownership was Ruger employee( one of the Former CEOs) They offer a discount and the program numbers were 1-200
There were sure was a nice pile of Rugers in his estste numbered to him. Sadly i could only afford one. I was offered quite a few.
Example. If you are in program you are issued a number and all your guns are 0000050 if you are #50 so your 10/22 is 0000050, your single six is 0000050. So your MK1,2,3,4 are also all 0000050.