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Official Cosmonauts Chronograph Monolith

Name: Fortis Official Cosmonauts Chronograph Monolith 638.18.31
Brand: Fortis

Reference638.18.31

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Case: 42 mm · Stainless steel
Thickness: 15.5 mm
Water: 200 m
Bezel: Unidirectional rotating
Calibre: ETA 7750 · 42 h
Dial: Black

Description

The Fortis Official Cosmonauts Chronograph Monolith 638.18.31 has a 42 mm stainless steel case, 15.5 mm thick and water-resistant to 200 m. It has a black dial with Arabic numerals. It uses the automatic ETA calibre 7750, with a 42-hour power reserve. Its functions include date, day, chronograph and small seconds.

Specifications

Case

Shape: Round
Diameter: 42 mm
Thickness: 15.5 mm
Lug width: 20 mm
Material: Stainless steel
Bezel: Unidirectional rotating
Caseback: Solid
Crystal: Sapphire
Water resistance: 200 m

Dial

Colour: Black
Indices: Arabic numerals
Hands: Baton

Movement

Calibre: ETA 7750
Type: Automatic
Power reserve: 42 h
Frequency: 28,800 vph (4 Hz)Escapement in slow motion
Jewels: 25
Functions: ChronographDateDayHoursMinutesSmall Seconds
Complications: ChronographDateDaySmall seconds

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