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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- by A.Bongiovanni Jr.
- Wed Mar 28, 2007 5:45 pm
- Forum: American Sterling & Coin Silver - Single Image
- Topic: Assay marks on Early American silver
- Replies: 2
- Views: 3776
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