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  • 903 H4

    The navigation chronograph with hand-wound movement and moon phase.

    903 H4
  • 903 H4
  • 903 H4
  • 903 H4
  • 903 H4


Warranty period leer years

Warranty Statement


Product number: 903.080 PDF

903 H4

This set includes the following bracelets:
This model is no longer available in our current range.
903 H4

For many watch lovers, the use of a hand-wound movement represents the purest form of a mechanical watch. No rotor impedes the view of the movement. Regularly winding becomes a personal ritual.  For those who are fascinated by a traditional hand-wound movement, there is a special series of our classic 903 navigation chronograph. This navigation chronograph has everything you need for precise orientation in time and space. The minute counter and the small second counter are at 3 and 9 o'clock respectively, while the hour counter is positioned at 6 o'clock. The second stopwatch hand at the center of the timepiece has a red triangular tip.  The design of the classic Lemania movement permits the integration of an additional complication in the Sinn 903 H4: the moon phase display is positioned in the circular field for the hand date at 12 o'clock. Thus a fourth time display completes the selection on the inner surface of the dial, making this model the most complex version of our navigation chronograph.

Special characteristics
  • Case made of stainless steel, polished / satinized
  • Lemania 1883 mechanical hand-wound movement
  • Moon phase display
  • Hand date
  • Interior bezel with logarithmic scale and slide rule function
  • Sapphire crystal glass
  • Transparent case back made of sapphire crystal glass
  • Charcoal grey electroplated dial, UV resistant
  • Pressure-resistant to 10 bar
  • Low pressure resistant

Technical details

Lemania 1883
Hand-wound movement
17 bearing jewels
21,600 semi-oscillations per hour
Seconds stop function
Shock resistant as per DIN ISO 1413
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
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
Hand date
Moon phase display
Interior rotating bezel with logarithmic scale (slide-rule function)
Dimensions and Weight
Case diameter: 41 mm
Band lug width: 22 mm
Case thickness: 13,2 mm
Weight without strap: 73 gramme
Dial and Hands
Charcoal grey electroplated dial
Indices coated with luminescent colour
Hour and minute hand coated with luminescent colour

903 H4 configure

Watch 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 H4.

The warranty period is leer 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.

Do you want to configure your 903.080

2.750,00 incl. VAT
Configure watch