Silver Cases: Troy or Common (Avoirdupois) Oz

CZHACK

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Apr 28, 2005
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Bkerr started a thread earlier this month on heavy silver cases. He asked an interesting question as to the weight measure (Troy as for precious metals or common Avoirdupois). Several of us were interested but no evidence or authorittative comments came back, so lets give it another try.

I have a Dueber case in very good condition marked 3 Oz (key wind) without movement, glass etc. It weighs 2.96 common ounces. (thats about right with 1% loss of silver to wear). Interestingly, it weighs exactly 3 troy oz with its thick glass in place.

Any other evidence? How about gold cases?
 

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