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- Collingwood Limited
Country City London
Era e.1817
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- Colonial Import Co.
Country City San Francisco CA
Era c.1934
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- Colonial Mfg. Co. Inc.
Country City New York NY
Era c.1950
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- Colonna, Edouard
Country City New York NY
Era (1862 – 1948)
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- Colpa, H.
Country City Boskoop
Symbol cartouche, frame, hexagon
Shape cartouche, frame, hexagon
Era early 20th century
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- Columbia Finding Co.
Country City Newark NJ
Era c.1943
-
- Comello, J.H.
Country City Amsterdam
Symbol cartouche, frame, ribbon
Shape cartouche, frame
Era early 20th century
-
- Comet Ring Mfg. Co. Inc.
Country City Buffalo NY
Symbol cartouche, frame, pear shape, shape
Shape cartouche, frame, pear shape, shape
Era c.1950
-
- Comfort Collar Clip Co.
Country City Chicago IL
Era c.1934
-
- Complete Ring Co. Inc.
Country City Newyork NY
Era c.1950
-
- Comstock-Wood Co.
Country City Providence RI
Era c.1934
-
- Comte Prosper d’Epinay De Briort
Country City Paris
Era (1836-1914)
-
- Comyns & Sons, William
Country Era e.1848
Symbol cartouche, circle, frame
Shape cartouche, circle, frame
-
- Concord Mfg. Corp.
Country City Providence RI
Era c.1950
-
- Conley Co.
Country City Spokane WA
Era c.1950
-
- Conn Inc., A.H.
Country City Chicago IL
Symbol cartouche, circle, frame
Shape cartouche, circle, frame
Era c.1934