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- Sequoia Jewelry Mfg. Co.
Country City Rome GA
Era c.1950
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- Silverman Bros Inc.
Country City Providence RI
Symbol cartouche, frame, oval
Shape cartouche, frame, oval
Era c.1922, c.1950, c.1943
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- Speidel Bros.
Country City Providence RI
Symbol cartouche, circle, frame
Shape cartouche, circle, frame
Era c.1937
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- Stahl Bros.
Country City Chicago IL
Symbol cartouche, frame, triangle
Shape cartouche, frame, triangle
Era c.1943
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- Streeter Brothers
Country City Attleboro MA
Symbol equal =
Era c.1896, c.1922
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- Sulzberger Bros.
Country City Providence RI
Shape square
Symbol square, swastika
Era c.1915