.22 cal 1875 Remington??

[Cherokee Reb]

Just watched an episode of American Digger where they were searching around Tombstone. In a small cave they found what they said was a rare .22 cal Remington revolver. It looked like a relic grade 1875 but with a round barrel. Per the local expert about 2000 were made in .22. I've never heard of such a critter and was curious if thus was true.

Thanks