Made by Windlass Steelcrafts®. Oakeshott introduced it in his treatise The Archaeology of Weapons: Arms and Armour from Prehistory to the Age of Chivalry in 1960. The system is a continuation of Jan Petersen's typology of the Viking sword, introduced in De Norske Vikingsverd ("The Norwegian Viking Swords", 1919), modified in 1927 by R. E. M. Wheeler into a typology of nine types labelled I to IX.
