Official Cosmonauts Chronograph

42 mm | Referenz: 638.10.11

Just like the other two members of the Cosmonauts family (FORTIS 647.10.11 Official Cosmonauts and FORTIS 647.27.11 Official Cosmonauts Titanium) the FORTIS 638.10.11 Official Cosmonauts Chronograph is part of the strictly defined basic equipment for any ROSCOSMOS cosmonaut. The FORTIS Official Cosmonauts Chronograph has demonstrably spent most of its time out in space and regularly sets out from Star City to the outer reaches of the universe, even today, as part of the ROSCOSMOS space programme.

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On the ISS, this loyal partner can always be read with precision, even when used outside the station, thanks to its Super-Luminova coating. Solid stainless steel and sapphire crystal with anti-reflective coating on both sides also ensure that good feel that you need for such demanding missions. The precision of the Swiss automatic movement (ETA 7750) can even keep pace with the natural orbit speed of approximately 28,000 km/h and delivers absolute exactness. Of course, few of us will ever find ourselves repairing a sun sail on the ISS, but one thing is clear: with the FORTIS 638.10.11 Official Cosmonauts Chronograph, you will be perfectly equipped for challenges here on earth too. This watch has been the star of the FORTIS Cosmonautis Collection for decades.


  • movement

    automatic Swiss movement, Valjoux 7750

  • case

    42 mm Ø stainless steel, sapphire crystal, anti-reflective coating on both sides, water resistant 20 bar

  • packaging

    leather box, instruction manual including international warranty, Official Cosmonauts certificate

  • dial/hands

    numbers, indices and hands coated with white Superluminova, green afterglow

  • function

    chronograph, hour, minute, permanent small second, 12 hour and 30 minute counter, day/date indication, tachymeter

  • options

    leather strap, leather performance strap, metal bracelet, rubber strap