Swiss metal split-seconds chronograph pocket watch Circa 1925

Rare rattrapante chronograph by Longines
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An interesting and rare Longines pocket watch with split-seconds chronograph Rattrapante and 30-minute counter, circa 1925.
Very fine precision movement, split-seconds, Ankerchronometer calibre 19.73M. Signed enamel dial, rare version with red scales, Breguet-style radial hours, outer minutes/seconds track, subsidiary dial for the seconds, 30-minute counter, and gold Breguet hands. Polished original signed metal case, movement and case with matching number 4422151.
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Diameter: 52 mm
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Weight: 100 g
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Signed: Longines Anti Magnétique