Purity 999 fine gold bullion coins. The One Double was legal tender and was first minted in 1830; it was released periodically until 1966 together with the Two, Four and Eight Doubles.

	OFFICIAL ISSUE PRICE Subject to world gold prices.       QUANTITY SIZE PRICE 1-5 1/10 troy ounce £ 32.50ea 1-5 1/4 troy ounce £ 71.50ea

Twelve-month limited yearly issue (by coin date).

They were unlike most other world coinage that generally features the current head of state; the States of Guernsey (the local government) used a strictly Guernesiais motif, hence the ancient seal of King Edward I given to the island in 1279 that featured on the Doubles. The original seal bore the three lions of England, crowned later to become leopards, surmounted by a branch to represent broom or 'planta genista', Edward's badge of rank. Above the seal was 'Guernesey' in French, the legal and everyday language of the island at that time.

The historic Guernesey double design features on the obverse side the royal seal of King Edward I, given to the island of Guernsey in 1279; the reverse features the coin denomination, the year of minting and the purity mark.