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- Montana Agate Co.
Country City Billings MT
Symbol cartouche, frame, shield
Shape cartouche, frame, shield
Era c.1922
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- Montclair JLY. & Novelty MFG. Co.
Country City New York NY
Shape shield, triangle
Symbol scroll, shield, triangle
Era c.1922
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- Moore & Son Inc.
Country City Newark NJ
Symbol anchor, x
Era c.1896, c.1915, c.1934, c.1950, c.1943
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- Moorhead & Co., R.L.
Country City Providence RI
Shape star
Symbol Mogen David, star
Era c.1915, c.1934
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- Mopits, Karl
Country Era 1867-1922
Symbol cartouche, frame, line, rectangle
Shape cartouche, frame, rectangle
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- Morgan Jewelry Co.
Country City Providence RI
Shape star
Symbol star
Era c.1934
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- Morlock, Rudolf
Country Era 1867-1922
Symbol cartouche, frame, oval
Shape cartouche, frame, oval
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- Moser & Reichm
Country Era 1867-1922
Symbol cartouche, frame, tree
Shape cartouche, frame, rectangle
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- Moser, Caroline
Country Era 1867-1922
Symbol cartouche, frame, oval
Shape cartouche, frame, oval
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- Moser, Ernst
Country Era 1867-1922
Symbol cartouche, frame, rectangle, v clipped
Shape cartouche, frame, rectangle, v clipped
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- Moser, Franz
Country Era 1867-1922
Symbol cartouche, dot ., frame, octagon, rectangle
Shape cartouche, frame, octagon, rectangle
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- Moser, Ludwig
Country Era 1867-1922
Symbol cartouche, dot ., frame, rectangle, v clipped
Shape cartouche, frame, rectangle, v clipped
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- Moser, Robert
Country Era 1867-1922
Symbol cartouche, frame, oval
Shape cartouche, frame, oval
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- Mottl, Karl
Country Era 1867-1922
Symbol cartouche, dot ., frame, octagon, rectangle
Shape cartouche, frame, octagon, rectangle
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- Mulholland Brothers
Country City Evanston IL
Symbol anvil
Era c.1914-1920
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- Muliar, Moische L.
Country Era 1867-1922
Symbol cartouche, frame, rectangle, v clipped
Shape cartouche, frame, rectangle, v clipped