French chronometer with split seconds chronograph Circa 1948

Air France navigation chronometer by Breguet
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A rare Air France navigation chronometer with split seconds chronograph, circa 1948.
Nickel chromium plated case, screwed on a black dial plate, with pusher for “rattrapante” and pusher for stoppable balance. Creamy coloured dial with Arabic 24-hour numerals, split seconds chronograph and blued spade hands. Bridge movement, frosted, gilt, with finely ground and bevelled chronograph steel parts, ratchet wheel, ground double hand tong with polished bevelling and separate ratchet wheel for split seconds chronograph and a Guillaume balance. Signed original mahogany box.
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Diameter: 70 mm
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Signed: Breguet “Rattrapante Mise à L’Heure”