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- Maschmeyer-Richards Silver Co.
Country City St. Louis MO
Symbol arrow, cartouche, circle, frame
Shape cartouche, circle, frame
Era c.1934
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- Mason Jewelry Co., C. H.
Country City Providence RI
Era c.1922
-
- Mason, Howard & Co.
Country City Attleboro MA
Symbol bird, crest, crown, globe, shield, world
Shape crest, shield
Era c.1896, c.1915
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- Masserman Co., Charles
Country City Newark NJ
Era c.1950
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- Massover Bros. Inc.
Country City Chicago IL
Era c.1950, c.1943
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- Matsumoto, Ikko
Country City Indianapolis IN
Era c.1934
-
- Mauran Mfg Co., J.T.
Country City Providence RI
Symbol heart
Shape heart
Era c.1896, c.1915
-
- Maxann Mfg. Co. Inc.
Country City Providence RI
Symbol crown
Era c.1950
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- May Bros. & Co. Inc.
Country City New York NY
Era c.1934
-
- May Co., Frank T.
Country City New York NY
Era c.1915, c.1922, c.1934, c.1943
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- Mayer & Bros., Jos.
Country City Seattle WA
Symbol cartouche, fleur de lis, frame, triangle
Shape cartouche, frame, triangle
Era c.1896, c.1915
-
- Mayer, Inc., Jos.
Country City Seattle WA
Symbol pick, x
Era c.1922
-
- Maytree Products Co.
Country City New York NY
Symbol tree
Era c.1950
-
- Mazer & Co. Inc., Joseph J.
Country City New York NY
Symbol cartouche, ellipse, frame, triangle
Shape cartouche, ellipse, frame, triangle
Era c.1950
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- McCarthy & Hamrick
Country City Arlington TX
Era c.1950
