French style, probably Belgian manufacture (a Belgian triple proof mark is very similar). This style, particulary the stock, originated in 18th and was popular for "trade" guns into the early 20th century. I like the idea it was imported from Europe to Mexico during the reign of Maximilian I (1864-1867). Emperor Maximilian was supported by Napoleon III, and Max's wife was Charlotte of Belgium. But I beleive similar guns were relatively common all over Latin America, end probably elsewhere; over the years a saw some here in Central Europe as well.
- Jani