1980 4 coin Gold Proof Set manufactured by the Royal Mint.
The set contains 4 coins in : 5 pounds, 2 pounds, Sovereign and half sovereign for a total of 2 oz of fine gold.
The coins are minted in .9167 purity.
The set comes with a Certificate of Authenticity which provides the background about the Sovereign as well as the specifications of the coins.
A rare chance to own a gold Sovereign Proof set because collectors do not usually put these up for sale.