France
Napoleon III gold 10 Francs 1866-BB MS67 NGC, Strasbourg mint, KM800.2. A superbly satiny gem tied for the finest yet seen for this date across both major grading services and thus unattainable in finer certified condition.
https://coins.ha.com/itm/france/france-napoleon-iii-gold-10-francs-1866-bb-ms67-ngc-/a/3089-32530.s?type=CoinArchives3089
HID02906262019
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Estimate: 1000-1500 USD