American nickel brass Trade Union watch Circa 1900-1910

Nickle brass Trade Union railroad watch by Hamilton Watch Co.
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A rare American Trade Union railroad watch. Ball Watch Co. model Grade 999 Brotherhood of Locomotive Engineers Official Standard by Hamilton Watch Co., circa 1900-1910. 21 Jewel, radial damascened full plate signed Official B of L E Standard, jewels in settings, bimetallic balance, overcoiled spring, swan’s neck regulator, stem wound, lever set. White enamel dial, black Arabic numerals, subsidiary seconds and blued hands. Nickel brass open face case, monogrammed B L of E.

Diameter: 61 mm
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Signed: Trade Mark B of L E Standard Ball & Co., Cleveland – Trade Mark Official B of L E Standard Ball & Co. Cleveland