Swiss gold pocket watch with chronograph and counter Circa 1925

Gold open faced chronograph with enamel monogram
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A Swiss 18 carat gold open faced chronograph pocket watch with 30 minute counter and enamel monogram, awarded with four Grand Prix, made by Longines, circa 1920-1930. The case has a round hinge and a gold bowl signed with engraved medals for four Grand Prix: Paris Paris Milan Bruxelles. Blue enamel initials appear on the case back, and the inside is numbered. The white enamel dial has Roman numerals, a blue tachymeter scale, and a red telemeter scale. It features two vertical counters for 30 minutes and seconds, an external graduated scale, a minute track, a central second hand for the chronograph, and blued steel spade hands. The signed mechanical movement includes crown winding, anker escapement, spiral balance, and advance and retard adjustment.
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Diameter: 51 mm
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Weight: 99 g
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Signed: Longines