Ok, I'll try to post some pictures later tonight, but just got in the mail a cylinder I bought off eBay. It was listed as a 12 stop conversion cylinder for an 1853. I took a chance on it because I noticed it had six chambers and got it for under a $100.
My Lord, it's appears to be a 12 stop Richards and it looks like it may never have been installed or fired. It is in 44 Colt and has almost full blueing, inspectors marks, the last four of a serial and you can still see most of the engraving, light, but it is there.
Like I said, I'll try to take some decent pics later and get them up tonight.