Two jewellery pieces, one thought to commemorate a royal marriage, found on the same piece of land in Rode have been formally declared national treasure* by the senior Somerset Coroner.

Both were found, on separate dates, and by different people, on what was referred to as cultivated land owned not far from Frome.

The first piece, part of a silver cufflink, was found on August 26 this year by Gary Palmer and is thought to date from between 1650 and 1740. The silver disc which the coroner explained was just 16.3 mm in diameter, was marked with two hearts and a crown.

The British Museum report said that the decoration would indicate that it was made to commemorate the marriage of Charles II to Catherine of Braganza in May 1662.

Senior Coroner Tony Williams told the inquest in Taunton ( December 9) that given the age of the piece, and that it was formed of precious metal, he was declaring the find to be officially treasure, adding that the Museum of Somerset was interested in acquiring the piece.

On the same land, but later, on September 20, a medieval brooch had been discovered by Mark Singer. The silver brooch was described by Mr Williams as: " A pretty well round brooch, with a pin going across from one side to the other and around the edge are some very small stones."

The inquest was told that his piece dated between 1200 and 1400, with the design going out of fashion in the early 14th century.

Mr Williams once again formally declared the find to be treasure.

• Under the 1996 Treasure Act, if the coroner declares a piece to be treasure then the finder must offer the item for sale to a museum at a price set by an independent board of antiquities experts known as the Treasure Valuation Committee.