6.- Shape.- In addition to the round coin, there are other polygons (square, rectangular, pentagonal, octagonal, etc.); for example, the 10-peso heptagonal coin minted in Mexico between 1974 and ...

Time to check your pockets and piggy banks for the 20 peso coin that people are offering 5 million for. Its design is so special that it's worth that whopping amount. The 20 Mexican peso coin is ...