Lot 412

Longines

Anti-Magnétique

A collection of 5 wrist chronographs
A rare and highly attractive, vintage dual-pusher flyback pilot's chronograph wristwatch with blue telemeter and tachy scale

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The very first series of chronograph calibre 13ZN was designed as a single pusher model without flyback function and works similar to the first chronograph calibre ever made, which was calibre 13.33Z developed in 1913. The chronographs were designated "transitional 13ZNs"; they featured enamel dials and are very hard to find today.
In 1936 Longines began producing calibre 13ZN, the first chronograph mechanism with flyback function and two pushers; the company also applied for a patent for it. This particular type of chronograph was designed specially for pilots, who very much depended on ease of use for zero-setting or starting and stopping their chronographs. After a production run of approximately 11 years, calibre 13ZN was replaced by calibre 30CH in 1947 – which would eventually become a cult icon.