The Basics

The ref. 638.10.11 Fortis Official Cosmonauts Chronograph has a stainless steel case of 42mm, housing the proven Valjoux / ETA 7750 movement. Somewhat of a cult classic, this watch and its predecessors have been part of countless space-missions over the last 20 years.

Brand: Fortis
Family: Cosmonautis
Reference: 638.10.11
Name: Official Cosmonauts Chronograph
Produced: N/A
Limited: No

Below is a detailed look at Fortis’s model 638.10.11 from Cosmonautis watch family, including the price, case details and movement features.

Fortis Cosmonautis 638.10.11

- Advertisement -

The Details

Fortis’s Official Cosmonauts Chronograph (638.10.11) was originally released in N/A. This watch features a automatic movement beating at a frequency of 28800 bph ( 4 Hz) to provide a 42-hour power reserve when fully wound.

The Case

The stainless steel case measures 42mm in diameter and roughly 15.5mm thick, with 20mm lug width. The round case is paired with a black color dial with stick-shaped hands, and a arabic numerals hour markers and minute track, covered by a sapphire glass. Fortis’s Cosmonautis model 638.10.11 is water resistant up to 200 meters (656 ft). A solid caseback is over the back of the watch case.

Material: Stainless steel
Glass: Sapphire
Back: Solid
Shape: Round
Diameter: 42mm
Height: 15.5mm
Lug Width: 20mm
W/R: 200

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The Cosmonautis 638.10.11 movement is a powered by caliber 7750 made by ETA. The 25-jewel automatic movement is 30mm in diameter. Its balance wheel oscillates at 28,800 semi-oscillations per hour or 4 Hz. This movement offers a 42-hour power reserve.

Type: Automatic
Brand: ETA
Caliber: 7750
Base: N/A
Display: Analog
Diameter: 30mm
Jewels: 25
Reserve: 42 hours
Frequency: 28800 bph
Time: Hours, Minutes, Small Seconds
Chronograph: Chronograph
Additionals:

The Price

How much does the Fortis’s Cosmonautis 638.10.11 cost? This watch was introduced in N/A and has been in Fortis’s collection for around . This watch is not a limited release. As with most luxury watches, the price of depends on the availability and demand.

CURRENT PRICE: Not Available

For more information, visit Fortis online.

Specifications:

  • Brand: Fortis
  • Model: Official Cosmonauts Chronograph
  • Reference Number: 638.10.11
  • Limited: No

Case & Dial:

  • Material: Stainless steel
  • Glass: Sapphire
  • Back: Solid
  • Diameter: 42
  • Thickness: 15.5
  • Lug Width: 20
  • Dial Color: Black
  • Indexes: Arabic Numerals and Stick-shaped hands
  • Water Resistance: 200 meters

Movement:

  • Winding: Automatic
  • Brand: ETA
  • Caliber: 7750
  • Display: Analog
  • Diameter: 30mm
  • Jewels: 25
  • Power Reserve: 42 hours
  • Frequency: 28800 bph
  • Functions: Hours, Minutes, Small Seconds

About Fortis

Fortis logo

No description is available.

View all Fortis watches.

Fortis Watches

View more Fortis watches.

Discover new luxury watches and watch brands for men and women from our database of over 20,000 watches across more than 100 different brands.

LIKE OR HAVE THIS WATCH? JOIN THE CONVERSATION BELOW

Please enter your comment!
Please enter your name here