Nice original coin.

These coins were struck with gold in them.

.595 grams of pure gold embedded into the silver-alloy planchet.

During the Mexican Revolution, the Zapatista forces at the Campo Morado mint lacked precise industrial refining equipment. They melted local silver and gold ore together to form electrum

To guarantee value to merchants, the mint master text-stamped the reverse to promise that every single coin contained exactly 0.595 grams of fine gold, regardless of how much silver or copper made up the rest of the physical coin.