France
Louis XIII gold Ecu d'Or 1637-D AU Details (Test Cut) NGC, Lyon mint, KM41.4, Gad-55 (R2), Dup-1282. Despite the presence of the noted test cut, the current offering endures as a well-preserved survivor with notable residual luster across mellow-golden surfaces, and is one of only two examples yet certified by the major grading services.
Ex. Querendon Collection (Stack's International Sale, January 2011, Lot 318)
https://coins.ha.com/itm/france/france-louis-xiii-gold-ecu-d-or-1637-d-au-details-test-cut-ngc-/a/61259-99030.s?type=DA-DMC-CoinArchives-WorldCoins-61259-02272022
HID02906262019
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