Online Encyclopedia of Silver Marks, Hallmarks & Makers' Marks
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American Silver Marks ~ Sterling & Coin Silver

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Alphabetical Listing by Maker's Name
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A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   Y   Z

Pictorial Marks                  Initial Marks                  Unidentified Marks

page 1 - Oa • Os           page 2 - Os • Ow
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John Osborn
Utica & Homer, New York
1st H. 19th C. In partnerships: Rugg & Osborn (before 1804), Osborn & Hammond (c.1804), Butler & Osborne (c.1805-1807). Relocated his business to Homer, NY in 1820. Grandfather to William Osborn Stoddard, secretary to Lincoln. Mark with reversed "S" is likely earliest.

J. Osgood
John Osgood Sr.
Haverhill, New Hampshire
(b.1770-d.1840) Active 1795-1817, silversmith & clockmaker, also used a "J•O" mark.

J. Osgood
John Osgood Jr.
Boston, Massachusetts
(b.1798-d.1861) Active 1821-1857, silversmith & watchmaker, apprenticed with his father and inherited both the illustrated mark and the "J•O" mark.


Clemens Oskamp
Cincinnati, Ohio
(b.c.1822-d.1887) Active 1854-1887, silversmiths, jewelers, clock and watchmakers, large establishment with retail outlet at 175 Vine St. (from 1868) and separate manufactory on Harrison. Succeeded by Oskamp-Nolting Jewelers.

Theodore Oskamp
Cincinnati, Ohio
(d.1854) Active 1845-1854, silversmiths, jewelers, watchmakers. Clemens Oskamp joined the firm in the 1840s and inherited it upon his brother's death.

Jonathan Otis
Middletown, Connecticut
(b.1723-d.1791) Active 1750-1791, apprentice to Moody Russell, worked first five years in Newport RI, afterwards relocated to Middletown, CT. Working silversmith.

AF Otto
August F. Otto
Chicago, Illinois
(b.c.1804-d.1890) Active 1840s-1870s, jeweler, watchmaker & retail silversmith.

E. Outten
Ephraim Outten
Accomack, VA
Maysville, KY
(b.1781-d.1825) Active in Virginia (1803-1816), in Kentucky (1816-1825), working silversmith.


John Owen Jr.
Philadelphia, Pennsylvania
Active c.1804-c.1840, silversmith & jeweler. Listed as J. Owen & Company by 1839.

Lewis Owen
Montgomery, Alabama
Active 1831-1856, silversmith and jeweler, partnership of Owen & Wright c.1845

Alphabetical Listing by Maker's Name
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A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   Y   Z
• • •
Related Pages at
American Silver Marks Menu
Gorham Date Marks
Kirk Date Marks
Reed & Barton Dates
Stieff Date Marks
Tuttle Date Marks
Whiting Date Marks
Tiffany Date Marks
Silverplate Trademarks
American Flatware Pattern Menu

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