Analysis of information sources in references of the Wikipedia article "Henry VII of England" in English language version.
1497–1558 – Henry VII authorizes standard. & A unit of mass = 453.592 37 grams (now, technically, the international pound), now used chiefly in the United States, but since the 16th century the most commonly encountered unit of mass throughout the English-speaking world. The magnitude of the pound avoirdupois has varied less than 1% since the middle of the 14th century.