In the collection of the Polish Army Museum in Warsaw, there is an Xa-type sword following Ewart Oakeshott’s classification deriving from the vicinity of Sztum. This sword is decorated on both sides with an ornament: in the form of the letter S within a circle on one side, and an equal-armed cross (cross potent) on the other. Formal features of the sword indicate its production between the mid-11th and 12th centuries, while analogies for its decorations, as well as the region where it was found, also point to the sword being dated to the first half of the 13th century.