Unger Brothers Newark, New Jersey ~ 1872 - 1914 Sterling flatware, holloware, jewelry and novelties. Especially fine Art Nouveau work.
Udall & Ballou New York, NY ~ 1888 - 1940s Upscale jewelers & retailers of sterling ware.
Uncas Mfg. Co. Providence, Rhode Island ~ 1911 - present Large manufacturer of sterling & costume jewelry. First mark used c.1920 - 1988, the second was introduced in the mid-20s.
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