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<p>[QUOTE=&quot;Bill in Burl, post: 2970204, member: 23692&quot;]The information that I posted came from the book &quot;The Practical Book of Cobs, 2nd edition&quot; by Frank Sedwick.&nbsp; The information on the Potasi mint is on p11-12.&nbsp; They made silver cobs there from 1574-1773, the longest run of cobs from any Spanish-American mint, but no gold cobs through its entire history.&nbsp; The mintmark is always P, meaning either Potasi or Peru.&nbsp; p12 lists all the assayer marks for the entire time that shield types were made, up until about 1650.&nbsp; Then most of the mints went to the &quot;pillar and wave&quot; types through to the mid to later 1700&#039;s ending about 1770 for the Potasi mint.&nbsp; There is a large annotation that covers all the shield types that says &quot;All shield types were undated until 1617.&quot;&nbsp; All the pillar and wave types ARE dated.[/QUOTE]</p><p><br /></p>

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