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The navigation chronograph
The traveling companion you can always rely on. Featuring perfect orientation in space and time as well as the most important arithmetic functions, it is absolutely reliable, and easy to use despite its complexity.
- Integrated rotating bezel with logarithmic scale (slide-rule function)
- Case made of polished/satinized stainless steel
- Black or anthracite galvanized dial
- Sapphire crystal front and back glass with anti-reflective coating
- Pressure resistant to10 bar (= 100 m water depth)
- Resistant to low pressure at high altitudes
Technical Data
Model 903 ST
Movement:
- Valjoux 7750
- Mechanical lever movement with self-winding mechanism
- 28 jewels and 28.800 vibrations per hour
- Antimagnetic according to DIN 8309
- Shock resistance according to DIN 8308
- Hand setting with second hand stop
- Quick adjustment of the date
- Chronograph (stop function)
- Metering range of chronograph: 12 hours
Display/Functions:
- Inactive luminous hands and indices
- Hours, minutes, seconds
- Date in dial aperture
- Sweep seconds
- 30-minute recorder and 12-hour recorder
- Disc calculator bezel
Case:
- Stainless steel, polished/calendered
- Screwed-on case back
- Screw-down crown
- Scratch resistant, domed sapphire crystal, antireflective on both sides water resistant according to DIN 8310
- Pressure resistant up to 10 bar = approx 100 m water depth
Measurements:
- Case diameter 41 mm
- Lug width 22 mm
Guarantee:
- 2 years
Strap:
- Leather or bracelet