The 1990 Gold Proof Euro Fifty ECU Coin, specifically the Irish edition, has these characteristics:

1. Design and Appearance:

   • Obverse: Typically features national symbols of Ireland or related motifs.
   • Reverse: Denominated as "50 ECU," showcasing unity across European nations, often with stars or other symbolic designs.
   • Finish: The coin has a proof finish, giving it a reflective surface with frosted details on raised portions, indicative of a high-quality minting process.
     
     

2. Metal and Purity:

   • Minted in 91.67% (22-karat) gold, with a weight of 15 grams, providing approximately 13.75 grams of pure gold content.
     
     

3. Size and Weight:

   • Weighs 15 grams with a diameter of 28 mm, giving it a substantial size and feel.
     
     

4. Historical and Numismatic Value:

   • As part of the ECU commemorative series, this coin marks an important step towards the euro, highlighting the transitional nature of European currency.
   • The limited proof minting adds collector value, particularly for those interested in European monetary history.
     
     

5. Packaging:

   • Presented in protective packaging with a certificate of authenticity, emphasizing its collectible quality.

This coin is a valuable artifact from the pre-euro era, reflecting the economic and political shifts of Europe in 1990.