Mexico, 1994 AD., Mexico City mint, 10 Pesos, KM 553.

Mexico, Mexico City mint, 1994 AD.,
10 Pesos (27,7 mm / 11,28 g), bimetallic flan, center ring 5,60 g. of 0.925 silver, within brass ring, 11,18 theor. mint weight, mintage 15.000.000 , axes coin alignment ↑↓ (180°), reeded edge,
Obv.: ESTADOS UNIDOS MEXICANOS , above an oak and laurel wreath on a yellow bronze circle around an inner silver flan with the coat of arms of Mexico: a Mexican Golden Eagle perched upon a prickly pear cactus devouring a snake (the legend of Tenochtitlan).
Rev.: N$ 10 / 1993 - M° / DIEZ NUEVOS PESOS , the central circle of the Aztec calendar stone, the so called "Sun Stone" on the silver center ring, in the peripheral ring, the value on top, date and mint mark of Mexico City mint "M°" flanking.
KM 553 .

Year / Mint Mark / Mintage
1992 Mo 20,000,000
1993 Mo 47,981,000
1994 Mo 15,000,000
1995 Mo 15,000,000
1995 Mo 6,981 (proof issue)

The Aztec calendar stone, Mexica sun stone, Stone of the Sun (Spanish: Piedra del Sol, Nāhuatl: Ollin Tonatiuh), or Stone of the Five Eras, is a large monolithic sculpture that was excavated in the Zócalo, the main square of Mexico City, on December 17, 1790. It was discovered while Mexico City Cathedral was being repaired. The stone is approximately 12 feet (3.7 m) across and weighs approximately 24 tons. One aspect of the stone is its religious significance. One theory is that the face at the center of the stone represents Tonatiuh, the Aztec deity of the sun. It is for this reason that the stone became known as the "sun stone". Richard Townsend proposed a different theory, claiming that the figure at the centre of the stone represents Tlaltecuhtli, the Mexica sea or earth monster who features in Mexica creation myths. Another feature of the stone relates to time, hence the name "calendar stone". Some of the circles of glyphs are the glyphs for the days of the month. Further, some of the symbols may represent the five ages that the Mexica believed the earth had passed through.