The 5 pesos banknote of Mexico (above) issued by the State of Chichuachua in 1913 shows a miner drilling a borehole in the mine gallery. The 20 pesos banknote (below) planned to be issued by the Mexican State of Guerrero has never become the legal tender, thus it has only the number of centuries in the year of the issue (19..); it shows a group of miners. [Images courtesy: Atsnotes]