Swiss rare 18 carat gold open faced pocket watch Circa 1882

Heavy open faced pocket watch by Louis Audemars
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A rare and heavy Swiss pocket watch specially made for Richard Oliver, Brooklyn, New York, with fine adjusting according his patent of May 9, 1882.
The case is 18 carat pink gold with case maker’s punch mark “RO” (Richard James Oliver, New York).  The dial is white enamel, signed, has Roman numerals, subsidiary dial for the seconds, 4/5 plate movement, screw compensation balance.
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Diameter: 54 mm
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Weight: 145 g
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Signed: Louis Audemars, Brassus & Geneva
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Oliver’s fine adjustment mechanism with a curved gear segment guiding the regulator is not only easy on the eyes but also easy to operate.
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This watch is described and illustrated in: “Louis Benjamin Audemars – His Life and Work. The rise and fall of a watch making dynasty” by Hartmut Zantke, Leonberg 2003, p. 380.