Harvard's $27.50 copy of the Magna Carta may be one of 7 issued by Longshanks in 1300

Harvard University bought what it thought was a 1327 copy of the Magna Carta for $27.50 in 1946. But after hyperspectral imaging at the University of East Anglia, the document is now thought to be one of seven issued in 1300 by Edward I, also known as Longshanks. This would place it among the first batch of official reproductions and immensely valuable.

…