In my first sentence above I typed quotation marks around the word Railsplitter because I learned that is not the official name of this pattern. In September 2011 I was inside a knife store in Seiverville, Tennessee which as I understand it was owned by the owner of the Colt brand at the time. They had a bunch of Colt knives on display but they didn't have this model so I asked the two clerks working the counter if they had any Colt Railsplitters. They both swore up and down that there is no such pattern in the Colt lineup and there never was.
I felt like I was in the Twilight Zone because not only does every dealer I had ever seen before call this a Railsplitter but I even own one myself. I thought those guys were nuts so when we got back home I checked their website and learned that Colt actually calls this a Rancher Stockman. But everybody else, myself included, calls it a Railsplitter.