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Jersey pound

On the island of Jersey, 14ᵗʰ – 19ᵗʰ centuries, a unit of mass, about 7561 grains. Chaney states it was “legalized by Acts of the Royal Court of Jersey on 11th December, 1593, 7th March, 1617, and 19th January 1625, which were confirmed by the Sovereign in Council in 1717.”¹

It is divided into 16 Jersey ounces, and probably derives from the livre poids de marc, about 7555 grains (489.5 grams). Chaney says it is identical with the marc de Rouen.

Simmonds says (see under cabot, page 59) that “13 local [Jersey] pounds being equal to 14 English,” which would make the Jersey pound about 7538.5 grains.

1. Henry J. Chaney.
Our Weights and Measures. A Practical Treatise on the Standard Weights and Measures in use in the British Empire...
London: Eyre and Spottiswoode, 1897.

Page 33.