The most recent coins date to 347-8 A.D. from the joint reign of Constantius II and Constans, the latter of whom was the last legitimate Roman emperor to visit Britain in 343 A.D. Almost all of the coins are a very common type known as a nummus made of copper-alloy with a small amount of silver. (The handful of 3rd century coins are radiates.) Most of them, more than 11,000, were struck at the min