Citizen “Cosmosign” 4390-432100

Model: Citizen La Mer “Cosmosign” 4390-432100

Year: October 1997

Features:

The History. The Citizen La Mer - French for “The Sea” - was one of the founding models in the brand’s Club La Mer line: an elegant sub-brand created exclusively for the Japanese domestic market. You’ll no doubt recognise the dial as an early prototype of the Campanola Cosmosign, and you’d be right. La Mer Cosmosign watches were among the early inspirations behind the modern Campanola collection.

The Accuracy. Released in 1986, this was the world’s first scientifically accurate star chart wristwatch. Citizen was so proud of its precision that it originally included a loupe to help owners examine every celestial detail. But why is a cosmic watch called The Sea? To pay tribute to ancient Japanese sailors that were guided by the stars, of course!

The Complication. The planisphere chart rotates in real time, displaying the current position of the stars above. It also shows daily sunrise and sunset times - a charmingly analogue way to stay connected to the sky.

Specifications:

Condition: In very good condition overall. Some minor hairlines and marks on the case, and the hands show signs of aging, but nothing you’d notice on the wrist. 

Scope: No box or papers.

Movement: : Citizen 4390 Zodiac Quartz

Dimensions:

• Case Width: 36.0mm
• Lug to Lug: 40.0mm
  
• Case Thickness: 7.9mm
• Lug Width: 18mm