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Sinn 903 St B E Navigation Chronograph Watch

$5,295.00 CAD

In addition to a fascinating variety of features, the SINN 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 watch 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.

Technical Data

Mechanical Movement

  • LJP 8000
  • Self-winding mechanism
  • 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 / satin
  • 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
  • Screw Down Crown
  • 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
  • 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 grams

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


    • 2 years