Swiss rose gold Geneva world time pocket watch Circa 1960

Gentleman’s Geneva open faced pocket watch 
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A gentleman’s very fine, extremely rare Geneva world time pocket watch, circa 1960.
Case: 18k rose gold, ground, polished, reeded bezel, push back. Silver dial, applied indexes/Roman numerals; central Arabic dark and light revolving chapter ring for day and night hours; outer world time chapter ring, bearing the name of 41 locations around the world and revolving with the bezel according to the Louis Cottier world time patent; gold halberd and dauphine hands. Bridge movement, rhodium plated, “fausses côtes” decoration, 8 adj., 18 jewels, screw compensation balance, index spring fine adjusting device.
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Diameter: 44 mm
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Weight: 63 g
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Signed: Patek Philippe Genève