Stack's Bowers & Ponterio
August 2019 Hong Kong Auction - Online Sess. 22 Aug 2019
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Though not present on this example, this countermark type comes with and without test punch or privy mark on the reverse at six o'clock. It is the belief of this cataloger that this is more than just a coincidence and is deserving of further in depth research from the specialist.
Estimate: $100.00- $150.00