Let's not forget the big S&W Break Open .44's and .45's that were used south of the border in both single and double action. The Spanish sold a bunch of copies of the S&W New Model Russians to their former colonies as attested to the ones that have surfaced in Central and South America over the years.
The "knock-offs" of S&W top-break revolvers were produced in the Eibar gunmaking region of Spain since at least the early 1880's, and were in fact officially approved as sidearms for Spanish Army officers. Interestingly, two double-action versions were adopted by Great Britain as substitute military service revolvers during WWI, chambered in .455 and officially called "Pistol, O.P.
['Old Pattern'], No. 1, Mark I" and "Pistol, O.P., No. 2, Mark I". The actual pistols received for service varied a bit in configuration, because they were actually produced by consortiums of small gunmakers, but here are the two War Department "Sealed Pattern" revolvers -
I have an example of each, although at present only my O.P. No. 1 revolver (top) is operational -
I have sometimes wondered if I would be permitted to use one of these revolvers in GAF competition, or even an NCOWS match. Although manufactured in the early 20th Century, they are definitely 19th Century designs .....