Swiss gold minute repeating pocket watch Circa 1913

Gold open faced pocket watch
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An ultra thin and very rare “bezel winding” minute repeating pocket watch, circa 1913.
An 18 carat gold case, gold dial, roman numerals, bridge movement, two hammers / two gongs, screw compensation balance.
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Diameter: 47 mm
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Weight: 50 g
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Signed:  Audemars Piguet / E. Gübelin  Lucerne Swiss
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The extremely flat (7 mm) pocket watch is based on patent no. 64738 filed by Audemars Piguet in 1913, the repeater is activated by turning the reeded bezel.
We only know of very few watches of this type. A similar Audemars Piguet bezel winding minute repeating pocket watch was sold at Sothebys for USD 31,250 in their 6/18/16 NY sale.