Frederic William Macomber
Fall River, MA c. 1855-1876
W.M. & J.B. Mayo
Chicago, IL 1867-1871
Henry Beebe Marsh
Detroit, MI 1840-1853 and New Brunswick, NJ 1853-1886 Jeweler.
Matson & Loomis
Milwaukee, WI 1859-1864 One of many businesses owned by
Newell Matson, this one with L.L. Loomis as his partner.
Horace E. Matteson
Seville, OH c. 1856-1887 Dry goods merchant.
William Wilson McGrew
Cincinnati, OH 1855-1875 Worked with his father Wilson
McGrew in the firm of Wilson McGrew & Son 1855-1859.
D. & G. McElwain
Becket, MA c. 1845 David and George McElwain, jewelers.
Marsh & Hoffman
Albany, NY 1880-1896 Benjamin Marsh and Frederick W.
Hoffman, jewelers and fancy goods merchants.
Simon M. Magnus
Albany, NY c. 1848-1860
John F. Mascher
Philadelphia, PA 1845-1863
John W. McDuffee
Lewiston, ME 1864-1867 and 1873-1876
and Portland, ME 1869-1880
Watchmaker and jeweler.
Maurice & Henry
St. Louis, MO 1859-1861 William H. Maurice and William D. Henry, jewelers.
James A. Main
Arcade, NY 1859-1861 and Warsaw, NY 1865-1910 Jeweler.
George H. Maynard
Boston, MA 1860 and 1868-1903
Watchmaker and jeweler.
McAuliffe & Hadley
Boston, MA 1910-1922
Macomber to McGrew
Macomber to McGrew
Charles S. Massey
Allentown, PA 1835-1881 Jeweler
Frederick W. Marmet
Cincinnati, OH c. 1850-1883 Jeweler.
John Maull
Philadelphia, PA c. 1846-1849 Jeweler.
Mansfield & Baird
Philadelphia, PA 1871-1876 Jewelers.
Thomas McCollin
Philadelphia, PA 1824-1833 Watchmaker.
John W. Mather
Parkersburg, WV c. 1870-1927
Was in the partnership of John W. Mater & Son with Walter T. Mather
from c. 1918 until his death in 1927.
Mayer & Graffe
Ft. Wayne, IN 1865-1881 with a branch in Wabash, IN
Founded by Andrew M. Mayer and Henry C. Graffe, jewelers.