Wittnauer Professional Chronograph Accessory this is a great way

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The patina to the Telemetre Scale printing is eye-watering

Reference 7150-1

the Reference 79170 with a bi-directional hour bezel

working to develop highly accurate navigation chronometers for many of the era's great aviation pioneers

Wittnauer Professional Chronograph Accessory this is a great wayBefore the Digital Age, the passage of time was recorded manually, marked by the stately sweep of a chronograph hand. A chronograph became an essential piece of kit for everyone whose life revolved around accurate timekeeping. From aviators and astronauts to soldiers, sailors, and race car driversall strapped chronographs to their wrists. Its uncertain when manufactures began applying the professional appellation to their watches. However, its