Spanish Colonial Cob Or 2 Reales 17th Century

Sometimes these Spanish colonial Reales are found on the Dutch or English beaches, like this one.

The silver real was the currency of the Spanish colonies in America and the Philippines. In the seventeenth century the silver real was established at two billon reals or sixty-eight maravedís. The coins circulated throughout Spain's colonies and beyond, with the eight-real piece, known in English as the Spanish dollar, becoming an international standard and spawning, among other currencies, the United States dollar.
From 1572 to 1773 Spanish colonial silver coins were cobs. Initially cut from a silver bar and hammer struck on a coin die, they were accurate in weight, though sometimes debased in precious metal content. However unlike machined coins, they were often irregular in shape, especially if a too-thick coin was clipped by the mint to reach the proper weight.
Cob denominations were 1/2, 1, 2, 4, and 8 reales. When circulating in New England the larger coins might be cut to give intermediate values; since a real was nicknamed a "bit", the expression "two bits" came to mean a quarter dollar. (wiki)

Obv: Spanish Coat-of-arms
Rev: Cross with spanish coat-of-arms symbols
Material: Silver
Diameter (mm): 23mm
Mass (gr): 6,2