In addition to a fascinating variety of features, the navigation chronograph 903 St B E boasts a functionally reliable dark blue dial with luminous ivory coated hands and indices. Watch lovers appreciate the attention to detail – and the impressive clarity in how the functions are arranged.
25 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Shock resistant as per DIN 8308
Anti-magnetic as per DIN 8309
Case made of stainless steel, polished / satinized
Sapphire crystal glass in front, anti-reflective on both sides
Transparent case back made of sapphire crystal glass, anti-reflective on the interior
Case back screw-fastened
Meet the technical requirements for waterproofness, as set out in standard DIN 8310
Pressure-resistant up to 10 bar
Low pressure resistant
Hours, minutes, subsidiary seconds
Interior rotating bezel with logarithmic scale (slide-rule function)
Dimensions and Weight
Case diameter: 41 mm
Band lug width: 22 mm
Case thickness: 14,5 mm
Weight without strap: 88 gramme
Dial and Hands
Dark blue dial and luminous ivory coating
Counters and interior bezel electroplated in silver
Number “12” and indices coated with luminescent colour
Hour and minute hand coated with luminescent colour
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