Heavy Iron Knife Blade. German Dark Ages, 800-1000 A.D. . Heavy Iron Knife Blade. German Dark Ages, 800-1000 A.D. Heavy single-edged knife with curved back (a German variation of the Scramsax used by the Vikings). Weapon size and weight. 8 long. Stabilized rust patina with typical pits and chips. Value Range $275-$375.