Population of only 7 coins
Mexico produced this bullion coin as part of their Pre-Columbian Azteca series. This 5 Peso (1 Onza) - 1 Troy Ounce coin shows a carved effigy (Brasero Efigie) on the reverse, with the national arms on the obverse.
With a mintage of ONLY 2,000 this is a hard to find coin! Listed in Krause as KM#648.