CRUSADERS. Crusader Imitations of Islamic Dirhams. Dirham (Silver, 23 mm, 2.44 g, 1 h), Akka (Acre), circa AH 647 = 1249/1250. Bates, Crusader Imitations, pl. I, 7. Heavily double struck on both sides, otherwise, about extremely fine.

This coin is a so-called flip-over double strike, meaning that the flan was not removed between two strikes but flipped over.