A Hanhart, chronograph, military WW2 era, manual wind, gents, chromium plated pilots wristwatch,

A Hanhart, chronograph, military WW2 era, manual wind, gents, chromium plated pilots wristwatch, circa 1940s, having a black dial with two subsidiary dials for seconds and minute counter, the caseback engraved 'Boden Edelstahl Wassergeschutzt Stossfest' and numbered 120549, 40mm