Swiss gold, enamel, diamond set watch and brooch Circa 1890

A fine Swiss gold, enameled and diamond set lapel watch and brooch, retailed by Hamann and Koch, New York, circa 1890. Manual winding lever movement with counterpoised escapement, bimetallic balance, overcoiled spring, pendant set, signed G-P. Green guilloché enamel dial, gold Arabic chapters, subsidiary seconds, gold pierced scroll hands. 18 Carat green guilloché enamel case, centering a diamond set coronet and wings. Movement signed. With 18 carat gold brooch formed from a pair of green guilloché wings flanking a round diamond.
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Diameter: 28 mm
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Signed: No name