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  • 903 St HB

    The navigation chronograph.

    903 St HB
  • 903 St HB
  • 903 St HB
  • 903 St HB
  • 903 St HB


Product number: 903.095 PDF

903 St HB

This set includes the following bracelets:
This model is no longer available in our current range.
903 St HB

Limited to 500 pieces, this navigation chronograph with its beautiful light blue sunburst dial is the perfect introduction to a completely redesigned series. As a whole, it operates at what could be considered a unique technical level. 

At the same time, the functionally designed dial with its fascinating performance characteristics imprints the navigation chronographs in our product range with decades of tradition. For example, the slide rule bezel with its logarithmic scale can be used to calculate times, distances or fuel consumption. Of particular note: We use hybrid ceramic luminous elements in the indices, which are meticulously attached by hand, the number 12 and the hour and minute hands. By integrating the illuminating pigments into the respective hybrid ceramic moulded part, we achieve a high concentration of the illuminant. The result is extreme brightness and perfect readability in the dark.  

Above all, however, the redesign of the case once again demonstrates our company’s high level of innovation. This case features a silver-electroplated bezel on the inside which can be smoothly operated from the outer diameter of the watch. The watch’s impressive waterproofness of 20 bar in this construction testifies to a feat of engineering that has long distinguished the SINN brand.

The design of a classic navigation chronograph is perfected by the Tri-Compax arrangement of the silver-electroplated counters. The technical highlight of the 903 St HB model is its column wheel chronograph movement, which has a power reserve of at least 60 hours when fully wound. The attachment of the SINN logo as an appliqué is another aesthetically pleasing detail of a consistently sophisticated watch.

Special characteristics
  • Limited to 500 pieces
  • Light blue dial with sunburst decoration
  • Case made of stainless steel, polished/satinised
  • Column wheel chronograph, exquisitely decorated
  • Hybrid ceramic luminous elements, meticulously attached by hand
  • Sapphire crystal glass
  • Transparent case back made of sapphire crystal glass
  • Bezel with logarithmic scale and slide rule function
  • Water-resistant and pressure-resistant to 20 bar
  • Low pressure resistant

Technical details

LJP L112
Self-winding mechanism
26 bearing jewels
28,800 semi-oscillations per hour
Seconds stop function
Anti-magnetic as per DIN 8309

The information on the mechanical movement corresponds to the current production situation in Frankfurt am Main. Due to technical changes, it may happen in individual cases that stock items of our sales partners deviate from this information.

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 water-resistance, as set out in standard DIN 8310
Water-resistant and pressure-resistant to 20 bar
Low pressure resistant
Hours, minutes, subsidiary seconds
Bezel with logarithmic scale and slide rule function
Dimensions and Weight
Case diameter: 41 mm
Band lug width: 22 mm
Case thickness: 14,5 mm
Weight without strap: 83 gramme
Dial and Hands
Light blue dial
Number “12” and indices made of hybrid ceramic luminous elements, meticulously attached by hand
Hour and minute hand made of hybrid ceramic luminous elements

Similar products

903 St HB configure

Watch strap
Leather strap
Solid bracelet
Silicone strap
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Warranty statement

In addition to the statutory warranty, we – Sinn Spezialuhren GmbH, Wilhelm-Fay-Strasse 21, 65936 Frankfurt am Main – provide a manufacturer’s warranty against material and manufacturing defects for the watch 903 St HB.

The warranty period is 2 years.

The warranty period is calculated from the invoice date.

Our warranty is applicable worldwide.

If you wish to make a warranty claim, we will repair the watch for you at no additional cost.

Warranty claims are excluded in the event of damage caused by:

  • Improper use
  • Repairs or attempted repairs which were not carried out by us or our authorised partners. A list of authorised partners can be found in the Sales and Service Partners menu on our website
  • Signs of wear and tear, especially to straps
  • The use of force (blows, knocks, impact)

Please inform us – Sinn Spezialuhren GmbH by phone +49 (0) 69/97 84 14-400 or email – as soon as you are aware of the potential warranty claim to avoid further damage. In order to approve the warranty, we will need the watch and proof of purchase (invoice) with a detailed description of the damage.

In the event of a warranty claim, we bear the costs of sending and returning the watch as well as the transport risk, provided that the transport is carried out by the transport company specified by us and the watch has been securely packaged. Please contact us by phone +49 (0) 69/97 84 14-400 or email Otherwise, as the customer, you will bear the costs of the shipment and the transport risk.

Any costs incurred for customs duties, import duties and other fees incurred when the watch is returned to the recipient country must be borne by the recipient.

We provide this warranty in addition to your existing statutory rights for defects. These rights are not restricted by the warranty and they can be exercised free of charge.

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