Belgium
Baudouin gold Proof 100 Ecu 1989-(qp) PR67 Ultra Cameo NGC, KM175. Deeply mirrored fields with frosty devices and pristine surfaces. AGW 0.9989 oz.
https://coins.ha.com/itm/belgium/belgium-baudouin-gold-proof-100-ecu-1989-qp-pr67-ultra-cameo-ngc-/a/3076-31047.s?type=CoinArchives3076
HID02906262019
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Estimate: 1200-1400 USD