4 Reales - Carlos IV

Carlos IV inherited the Spanish throne in 1788 and almost immediately faced the fiscal strain of wars against Revolutionary and then Napoleonic France, forcing the colonial mints in Mexico City to maintain high output throughout his reign. The 4 reales denomination occupied an awkward middle position — too large for routine small transactions, too small for major commercial settlements — which kept it largely in the hands of merchants rather than general circulation.

The Mexico City mint's assayers changed several times across this issue's production window, and the assayer initial pairing stamped into each coin is the primary tool for dating individual pieces within the 1792–1808 range.