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- Campbell Metcalf Silver Co.
Country Era e.1892
Symbol arrow, cartouche, crown, frame, shape
Shape cartouche, frame, shape
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- Curtman Co. Inc.
Country City Providence RI
Symbol circle, hand, ribbon
Shape circle
Era c.1950, c.1943
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- Eastern Jewelry Co.
Country City Providence RI
Era c.1915
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- Mansvelt, Fa. H.M.
Country City Rotterdam
Symbol cartouche, cross, frame
Shape cartouche, cross, frame
Era early 20th century
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- Masserman Co., Charles
Country City Newark NJ
Era c.1950
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- Maurer, Carl
Country Era 1867-1922
Symbol cartouche, frame, rectangle
Shape cartouche, frame, rectangle
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- Mayr, Carl
Country Era 1867-1922
Symbol cartouche, dot ., frame, oval
Shape cartouche, frame, oval
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- Mol, Jr. C.
Country City Amsterdam
Symbol cartouche, frame, ribbon
Shape cartouche, frame
Era early 20th century
-
- Moser, C.
Country City Voorschoten
Symbol cartouche, frame, octagon, rectangle, square
Shape cartouche, frame, octagon, rectangle, square
Era early 20th century
-
- Moser, Caroline
Country Era 1867-1922
Symbol cartouche, frame, oval
Shape cartouche, frame, oval
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- Mossinger, C.J.
Country City Groningen
Symbol asterisk *, cartouche, frame, rectangle, square, star
Shape cartouche, frame, rectangle, square, star
Era early 20th century
-
- Müller, Carl
Country Era 1867-1922
Symbol cartouche, dot ., frame, octagon, oval, rectangle, v clipped
Shape cartouche, frame, octagon, oval, rectangle, v clipped
