Very fine French gold watch with chronograph Circa 1935

Gold open faced pocket watch
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A gentleman’s very fine pocket watch with chronograph, 30 min. counter and tachy scale, circa 1935.
An 18 carat gold case, open faced, keyless wind, push back, silvered dial  with subsidiary dial, 2/3 plate movement, Glucydur screw balance.
This is an extremely rare collector’s piece, a marvellous pocket chronograph in outstanding condition.
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Diameter: 44 mm
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weight: 76 g
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Signed:  Breguet  Paris