Breitling Navitimer B12 Chronograph 41 Cosmonaute (RB12302A1L1P1) Breitling Watch Review

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🔍 Design & appearance
18 ct red gold case, diameter 41mm, thickness 13.6mm, water-resistant to 30m

Dark ombré blue dial, with contrasting gold hour markers and black chronograph sub-dials

24‑hour scale & red Chrono hands: easy to read 24 hours, no light/dark confusion

Bidirectional bezel with slide rule – aviation/traffic calculations

Reflected caseback, engraved with "First Swiss Wristwatch in Space/…May 24,1962" and production number (“One of 250”)
⚙️ Movement & Features
Caliber B12 – automatic Manufacture, column-wheel chronograph, vertical clutch
Frequency 4Hz, power reserve ~70 hours, COSC certified

Functions: hours, minutes, small seconds, 1/4 second, 30 minute, 12 hour chronograph; date at 6 o'clock

Gold rotor, visible on the back