Help ID this silver cob that I dug today?

[screwynewy]

I dug a well worn cob today and was hoping to get an ID on it and maybe an approximate date. Thanks!

 

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[Mackaydon]

Mexico City Mint, Carlos II (?); 1/2 or 1R depending on weight. Use 27g as a measure of 8R and go from there.
Don.....

 

[screwynewy]

You always amaze me with your knowledge of Spanish coinage. I'll have to weigh it when I get back home but my guess is that it is a 1/2 Real based on how thin it is. Any idea on the range of years these were minted? I'm sure this one circulated quite a while before being dropped.

 

[screwynewy]

Based off your ID of this being a Carlos II then it would have been minted between 1665 and 1700. I found one that sold at auction that looks similar.

Mexico, Colonial. Carlos II. 1665-1700. AR 1/2 real cob. Mexico City mint, date off flan. - Agora Auctions

 

[Mackaydon]

The mint years for the 1/2R were 1668-1697 inclusively though several years were omitted. Assayer's initial 'G' through 1674; 'L' thereafter.
The mint years for the 1R were only 1668 and 1692; the 1668 had one of two assayer initials; either a "G" or a "L"; the '92 had "L".
Don....