I believe it's Mexican.
It's based on a 2-8-0 except with a trailing truck added. The trailing truck wasn't strictly necessary and as I understand, most or all of them in service had the trailing truck removed and were hence converted back to conventional 2-8-0's. The railroad might have wanted better tracking when running in reverse, or a lowered maximum axle load. The main visual difference between it and the consolidation it's based on seems to be the position of the cab. It's evident the cab is mounted farther back than was typical practice on outside frame 2-8-0's of the time, eliminating the cramped "deckless" arrangement. The rack on the tender indicates it was intended to be able to operate on wood fuel, if necessary.