Rattlesnake Jack, that is an awesome original and having a matching repro is very cool as well.
I've posted these before, but since we have an official '51 picture thread now
here's my Cimarron '51 conversions again.
The 7 1/2" Richards-Masons I had first, and the fancy 5 1/2" came later. They are charcoal blue, engraved by Kelly Laster, then I sent the frames to Doug Turnull for his case hardening. For a while I had Thunderer grips on them (hi-resolution pic of those that shows the engraving better here:
http://www.davidscottharper.com/shoot/Thunderer-Masons.jpg ) They now have Bar-S Tru-Ivory "slightly aged" grips.
I rotate through several sets of guns shooting CAS, but shoot these the most. Great for BP Gunfighter.
And this is the original set after I refinished the grips with an oil finish
Nichols Creek shot this video of me shooting the engraved conversions gunfighter style. Not the smoothest in the world and one rifle miss through the smoke, but who cares?