Capri -

Hickok Manufacturing Co., Inc., Rochester, NY. Since May, 1954.

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CA (with an arrow going through the letters) -

Carl-Art Inc., Providence, Rhode Island. Since January 1937.

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Carnegie -

Hattie Carnegie, Inc., New York, NY. Since January, 1919.

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Chanel -

Chanel, Inc., New York, NY. Since 1914.

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Charel -

Charel Jewelry Co., Inc., Brooklyn, NY. Since July, 1945.

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Ciner Manufacturing Company, New York NY.

Ciner - (Full Name mark) - Since 1892.

MC inside of a C - since January, 1914.

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Clipmates -

Trifari, Kurssman and Fishel, Inc., New York, NY. Since July, 1936.

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Coro - The Coro marks are going to be a HUGE undertaking since there are so many of them. In the meantime, please visit a good friend, and fellow Jewelcollect member's site, Illusion Jewels (see link below), where you will find many of the Coro marks listed. Thanks.