Spanish Gold was minted in Spain until the colonisation of South America.
 
An early Spanish Gold coin was the Excelente which was similar to the Venetian Ducat.
It was thus acceptable in International commerce.
In 1537 King Charles 1 st of Spain introduced the ESCUDO which was 24mm across and weighed 3.383 gm.
 
Tepuzque coins were introduced in Mexico City and were in use in the 16th century until about 1591.
These are incredibly rare and no known examples exist.
 
A Double Escudo (doblón) was known as a Pistole  but was not as popular as the 8-Escudo piece or as it became known the Spanish Doubloon.
 
This was made famous as PirateTreasure.
Because of the flood of Silver coming from Potosi,silver coins became the most commonly ones used in trade.

In 1622 a new Mint at Santa Fe de Bogota opened and from there came the first Spanish American Gold Coins - Cobs that showed the portrait of King Phillip on the Obverse.
 
The mint at Potosi produced Cobs from 1651 to 1773 but the quality was sometimes poor.

In 1696 Gold coins were minted at Lima and these had a row of dots close to the edge to prevent clipping

(a common practice was to cut off a small slice of each gold coin and these clippings were melted and sold)
 
In 1728 and 1730 milled edges were introduced and the  practice of clipping was curtailed.
 
At this time the Peso de Oro was 27·064 g and 22 carat gold.