These were all tool watches. The Jardur was built as a navigation device for the American Bomber squads like the 100th . If you search Jardur on this site I have a write up on its development and deployment. You are not just getting a vintage watch, you a
The Warner Plotter: Origins, Development, and WWII Aviation Use Historical Background and Origins of the Warner Plotter During the 1930s, as aviation expanded and navigational training became more sophisticated, a variety of manual tools were developed to
It really has so much charm to it and the red highlights really add to the look but I think my favourite bit of the dial is the 3,6 and nine being in the subdials rather than cutoff. I don't recall ever seeing that on a chronograph before, wear and enjoy