Some loss of interest in traditional.
NMLRA was formed in the 1930s and shot originals. It was a small market, prices were cheap because who wanted them old guns?
1950s saw many veterans, and the looming centennial of the WBTS, at the same time Italy was in a post war depression. Wages were low in fascist Spain. Wages were up in the US and a good gun could be had cheap.
No sooner was the WTBS centianial over then the Bicentennial was looming.
Texas sesquicentennial came shortly there after( Arkansas sesquicentennial was the same year....we got forgotten at the alter). Then Hundred and twentyfifth for WTBS.
Europe followed suit with the bicentennial of the Napoleonic wars.
After that a general drop in interest. Italy and Spain improved theirs economies, now it’s India that can provide inexpensive guns. However they provide to a smaller market.
How many reinactors will be interested in the hundred and seventy fifth of WTBS or the two hundred and fiftieth of the USA?
Companies that can’t sell a thousand units have to make more profit on a hundred units.