903 St B E Navigation Chronograph - 903.045

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. The chronograph also impresses those who enjoy performing analogue calculations with a classic slide rule. The positioning of an additional crown at 10 o’clock enables mathematical operations and is used to rotate the slide rule bezel with logarithmic scale. It also allows users to perform multiplication, division and cross-multiplication as well as other useful calculations such as fuel consumption, speed, distance and time. Additional watch features include a chronograph function for measuring and recording periods of time.

LJP 8000
Self-winding mechanism
28 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Anti-magnetic as per DIN 8309

Case
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
Winding crown screwable
Meet the technical requirements for waterproofness, as set out in standard DIN 8310
Pressure-resistant up to 10 bar
Low pressure resistant

Functions
Hours, minutes, subsidiary seconds
Date display
Chronograph
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 gr

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