Mexico 1 oz Proof Silver 5 Pesos Observatorio (The Observatory)

Coin Highlights:

• Contains 1 oz of .999 fine Silver.
• Coin packaged in a protective capsule.
• Limited mintage of only 10,000 coins.
• Obverse: Mexico's present coat of arms, surrounded by 10 previous coats of arms from Mexico's history.
• Reverse: An image of the Mayan observatory at Chichén, with denomination and 'Mo' mint mark.

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The Observatory at Chichén Itzá is called el Caracol (or snail in Spanish) because it has an interior staircase that spirals upward like a snail's shell. The round, concentrically-vaulted Caracol was built and rebuilt several times over its use, in part, scholars believe, to calibrate the astronomical observations.

The first structure was probably built here during the transition period of the late 9th century and consisted of a large rectangular platform with a stairway on its west side. The windows in the Caracol point in the cardinal and subcardinal directions and are believed to enable the tracking of the movement of Venus, the Pleiades, the sun and the moon and other celestial events.