Luxembourg
Republic gold Medallic 20 Francs 1964 MS67 NGC, Brussels mint, KM-XM4c. Struck to celebrate the accession of Grand Duke Jean. Tied for NGC's "top pop."
https://coins.ha.com/itm/luxembourg/luxembourg-republic-gold-medallic-20-francs-1964-ms67-ngc-/a/61306-24174.s?type=DA-DMC-CoinArchives-WorldCoins-61306-01232023
HID02906262019
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