German rare edition gold Glashütte pocket watch Circa 1900

Hunting cased pocket watch by Uhrenfabrik Union
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A German heavy hunting cased pocket watch, “very rare pink gold Louis XV edition”, with original seller’s box, circa 1900.
Engine turned 14 carat pink gold Louis XV case. Matching numbers on case and movement. Glashütte precision lever movement with minute wheel gold chaton, gold escape wheel and fine adjusting device. White enamel dial with Arabic numerals, sunk subsidiary dial for the constant seconds and pink gold Louis XV hands. Case, movement and dial signed.
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Diameter: 54 mm
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Weight: 106 g
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Signed:  Uhrenfabrik Union Glashütte Sachsen
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Probably sold by Huber Munich.