Artisan: Frank Rebajes (originally Francisco Rebajes).
Active Era: Primarily the 1930s through the 1950s in Greenwich Village, New York City.
Significance: He is widely recognized as one of the definitive masters of wearable copper art, transforming raw sheets of copper into abstract, surrealist, and biomorphic forms.
The Mark: While some of his mass-produced or later pieces are stamped with his full last name (Rebajes), his earlier studio creations, custom work, and select jewelry items featured this specific stylized, lowercase "f" emblem.