Nope: 50 pesos first existed as a giant gold coin, there was an ultra-rare alleged platinum coin minted as well. The next time it showed up, Mexican inflation had progressed to the point where is was a cupro-nickel coin, which was then downsized 4 years later. I got a downsized one (but I like this series - the inflationary 5-pesos coin is basically too tiny to even have anything on it, so it just says $5, the year, and Mo).



















