Assay marks on Early American silver

A.Bongiovanni Jr. · Post by **A.Bongiovanni Jr.** » Wed Mar 28, 2007 5:45 pm

Can an explanation please be given for calculating the purity of Early American silver using the assay marks? For example 10-15. Thank you.
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emaliek · Post by **emaliek** » Thu Apr 05, 2007 1:12 pm

According to the Rainwater book, the Baltimore Assay office marks for 1815-1830 were 11/12 or 10.15
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Post by **admin** » Thu Apr 05, 2007 2:28 pm

There's also just a bit more info in this post ->

http://www.925-1000.com/forum/viewtopic.php?t=3161" onclick="window.open(this.href);return false;
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