Fortis Cosmonaut Official Cosmonauts Day-Date Monolith

Reference 647.18.31

About this watch

The Fortis 647.18.31 Official Cosmonauts Day-Date Monolith is a statement piece, embodying the spirit of adventure and exploration. Its ETA caliber 2836-2 automatic movement provides precision and reliability, with 25 jewels and a 38-hour power reserve. The watch features a bold black dial with stick and dot indexes for excellent readability, even in low-light conditions. The 42 mm stainless steel case is sturdy and stylish, coated with PVD for added durability. A rotating bezel marked from 0 to 60 enhances the watch's functionality, making it ideal for diving or timing events. With a water resistance of 200 meters, this watch can withstand the rigors of outdoor adventures. The sapphire glass provides exceptional scratch resistance and clarity, ensuring that your beautiful watch face remains pristine. Whether you're an aspiring astronaut or just someone who loves a good-looking timepiece, the Fortis 647.18.31 has something to offer.
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Key Features

  • ETA caliber 2836-2 automatic movement
  • 42 mm stainless steel case with PVD coating
  • Rotating bezel marked from 0 to 60
  • Sapphire glass with scratch resistance
  • 200m water resistance
  • Bold black dial with stick and dot indexes
  • Sturdy and stylish design

Specifications

Brand
Fortis
Family
Cosmonaut
Model
Official Cosmonauts Day-Date Monolith
Reference
647.18.31
Movement
2836-2
Movement Features
  • Hours, Minutes, Seconds
  • Date, Day
Case
Stainless Steel 42mm
Dial Color
Black
Crystal
Sapphire
Water Resistance
200

Current Listings

[WTS] Vintage Fortis 610.22.158.1 Official Cosmonauts Blue Fume Dial Automatic Watch - $695

Vintage Fortis 610.22.158.1 Official Cosmonauts Blue Fume Dial Automatic Watch - $695

Fortis - 610.22.158.1 · $695
This Vintage Fortis 610.22.158.1 Official Cosmonauts Watch features a Mechanical (Automatic) movement and comes with a Fortis leather strap. The watch has been recently serviced, with some scratching on the Anti-Reflection coating of the crystal.

  • Condition: Used
  • Movement type: Mechanical (Automatic)
  • Straps: Fortis leather
  • Box: Generic
Posted at
Jun 18, 2025, 9:47 PM
Active
[WTS] Fortis Cosmonauts Chronograph 602.22.142 Extras $1790

Fortis Cosmonauts Chronograph 602.22.142 Extras $1790

Fortis - 602.22.142 · $1,790
A Fortis Cosmonauts Chronograph, issued for the Russian Cosmonauts Agency, featuring a Lemania 5100 chronograph movement and a sandblasted stainless steel case. The watch has a black matte dial with cream roman numerals and tritium lume.

  • Condition: great condition, signs of wear but no deep dings or scratches
  • Case dimensions: 38mm diameter, 20mm lug width, 46mm lug-to-lug, 13.75mm thickness
  • Movement type: Lemania 5100 chronograph movement
  • Strap material: brand new light brown 20mm genuine leather made by Fluco
Posted at
Jun 16, 2025, 9:37 AM
Active
[WTS] Fortis Cosmonauts Chronograph 602.22.142 Extras $1800

Fortis Cosmonauts Chronograph 602.22.142 Extras $1800

Fortis - 602.22.142 · $1,800
A Fortis Cosmonauts Chronograph with a sandblasted stainless steel case and a black matte dial, powered by the Lemania 5100 chronograph movement.

  • Condition: Great condition
  • Case Dimensions: 38mm diameter, 46mm lug-to-lug, 13.75mm thickness
  • Lug Width: 20mm
  • Movement: Lemania 5100 chronograph movement
Posted at
Jun 9, 2025, 9:23 AM
Active