That mark was used by Knut Gustafson's Chicago Silver Company, Chicago, Illinois.
Many Scandinavian craftsmen moved to Chicago at the turn of the century.
Encouraged by silversmith guilds in their native countries that were concerned about having a surplus of trained craftsmen.
Knut Gustafson, who previously worked with Randahl, Jarvie, Lebolt, and the TC Shop, was a Swedish immigrant.

Pat.
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