Swiss yellow gold keyless watch with black dial Circa 1938

Gold lever watch by Patek Philippe
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A Swiss yellow gold open faced keyless watch with black dial, made in 1938. Manual winding lever movement, swan neck precision regulator, cut bimetallic compensation balance, 18 jewels.
Black dial, Arabic numerals and dot indexes, outer minute track, subsidiary seconds, 18k yellow gold case, stepped bezel and snap-on back, case, dial and movement signed.
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Diameter: 46 mm
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Signed: Patek, Philippe & Cie Genève
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Accompanied by a Patek Philippe Extract from the Archives confirming sale in 1940 and black dial with raised gold hour-markers.

This watch is the earliest example of this particular reference with this numeral configuration combined with a black dial kwown.