Swiss high-grade 18K gold chronograph Compteur Circa 1925

Open faced pocket watch by Longines
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A Swiss high-grade single-button chronograph Compteur, circa 1925.
18-carat gold plain case with a small engraved inscription. Dome with later dedication. Precision lever movement with chronograph, calibre 19.73N, matching numbers on movement and case. White enamel dial with black and red Arabic numerals for the hours, subsidiary dial for the constant seconds, subsidiary dial with jumping 30min counter, blued centre chronograph hand and gold Breguet hands.
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Diameter: 52 mm
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Weight: 90 g
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Signed: Longines