Specimen Proof Uncirculated Monaco Essai Piedfort silver 50 francs coin.
Struck for Prince Rainier III at the Paris Mint (mint mark privy marks).
Piedfort struck with 2x thickness and weight (20 grams).
Rare with only 450 coins minted.
Certified by PCGS to SP 64, Population Census: 5 coins, only 1 higher.
Toned with lustrous and reflective surfaces (especially reverse).