Weyersberg was essentially a family sword-making dynasty. This family is recorded as making swords as early as the 1400's, and was located near Solingen, Germany. They produced blades with the King's Head and a rooster marking. Prior to the Civil War, we find its blades used by such makers as Frederick Widmann and Horstmann & Sons. During the American Civil War, Horstmann & Sons used many of Gebruder Weyersberg's blades on its higher grade swords.
Gebruder Weyersberg King's Head marking on an early Eagle Head Sword made by F.W. Widmann
Gebruder Weyersberg King's Head marking on Civil War Horstmann & Sons' sword