Twitter 上的 Celestial Sentinel:"Ulfberht Swords. All-steel swords from the Viking era. Dated from 9th to 11th centuries, with blades made from crucible steel inlaid with the inscription +VLFBERH+T or +VLFBERHT+ Sword from
11.4.3 Ulfberht Swords
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11.4.3 Ulfberht Swords
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Patterns
A Tale of Weapons – Ulfberht, the Mysteriously Strong Viking Sword
Archeologists Baffled by Mysterious Viking Sword Made of 'Crucible Steel' 800 Years Before It Was Invented