Thailand
Rama IX gold Proof "White-Eyed River Martin" 5000 Baht BE 2517 (1974) PR70 Ultra Cameo NGC, British Royal mint, KM-Y104. Proof mintage: 623. Conservation series. A perfectly certified representative of this extremely popular and limited mintage issue, richly frosted over the devices, which contrast fully against the mirrored golden fields behind.
https://coins.ha.com/itm/thailand/thailand-rama-ix-gold-proof-white-eyed-river-martin-5000-baht-be-2517-1974-pr70-ultra-cameo-ngc-/a/3084-30365.s?type=CoinArchives3084
HID02906262019
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Estimate: 8000-10000 USD