Monaco
Rainier III gold Proof Essai 50 Francs 1974-(a) PR65 NGC, Paris mint, KM-E67, Gad-162. A scarce gold Pattern of the 50 Francs Essai type, commemorating the 25th anniversary of Ranier III's reign. Reflective and flashy, with only lighter instances of handling that allow for gem-level certification.
https://coins.ha.com/itm/monaco/monaco-rainier-iii-gold-proof-essai-50-francs-1974-a-pr65-ngc-/a/3088-35032.s?type=CoinArchives3088
HID02906262019
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Estimate: 2500-3000 USD