Don't forget...the 1849 Pocket was the biggest selling Colt...340,000 total made in all, but some 240,000 were in existence by 1865. So, it is a very likely candidate.
As for being an expert, I am not. But I have a couple of Pockets, and the repro flask, and I do shoot them so that makes me "knowledgeable". Happy to help...that's what this Forum is all about.
So when are you taking me on a Relic hunt? (droooolllllllll......)