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- Schwarzkopf, J. & Co.
Country City Providence RI
Symbol laurel, ribbon
Era c.1896 c.1934
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- Sedlicky, J.
Country Era 1867-1922
Symbol cartouche, circle, frame
Shape cartouche, circle, frame
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- Sigsgaard, J.
Country Era 1933-1960
Symbol cartouche, frame, oval
Shape cartouche, frame, oval
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- Standard Jewelry Co.
Country City Attleboro MA, New York NY
Symbol cartouche, diamond, frame, lozenge, octagon, rhombus
Shape cartouche, diamond, frame, lozenge, octagon, rhombus
Era c.1922, c.1937, c.1943
