Fortis - Aeromaster (Paul Gerber Special)



Product Details

Fortis Aeromaster - Alarm Chronograph.

A built-in alarm is a rare complication in a mechanical wristwatch. Rarer still is an automatic chronograph with a built-in alarm. So rare, in fact, that FORTIS’s patented F-2001 movement, which went into serial production in 1996, was the first caliber so equipped.

It was created in collaboration with the Zurich master watchmaker Paul Gerber, who gave the basic caliber a single mainspring barrel and a striking mechanism with beaten mainspring and extra-large hammer. The alarm watch can be switched off or interrupted at will by means of a smooth-running pusher at eight o’clock. The alarm emits a 27 second long rattling sound after full winding.

For pilots who spend their lives above the clouds. Items necessary for a hard days flying must be simple and purposeful. Good readability, robustness, anti reflective glass and a glare free case are the most important performance characteristics. Just like the original Fortis B 42 model, the 656.10.10 Fortis Aeromaster Steel Chronograph takes up the reins of these properties and perfects them, right down to the smallest detail.


  • Case diameter: 42 mm
  • Water resistance: 200 m / 600 ft / 20 atm
  • Body material: Black PVD coated Stainless Steel
  • Bezel type: Unidirectional rotating countdown bezel
  • Bezel material: Black coated stainless steel
  • Glass: Sapphire crystal with anti-reflective coating AR 027 on both sides
  • Case back: See-through case back

Crown and Pushers:

  • Crown type: Quick pull crown
  • Pushers: Chronograph start/stop/reset pushers
  • Other: Alarm Pusher

Dial and Hands:

  • Dial colour: Matt black
  • Dial pattern: Finely grained base structure / grooved totalisers
  • Hands: 12h-Counter, 30 Minutes Counter, Alarm, Central Second, GMT, Hour (luminous), Minute (luminous), permanent small second



  • Complications: Alarm, Chronograph, Date
  • Winding: Self-winding
  • Power reserve: 48h

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