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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

Documents

Product number: 903.080 PDF

903 H4

This set includes the following bracelets:
This model is no longer available in our current collection.
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 . This navigation 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 .

903 H4
Special characteristics

Technical details

Lemania 1883
Hand-wound movement
17 bearing jewels
21,600 semi-oscillations per hour

Shock resistant as per DIN ISO 1413
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 , polished / satinized
glass in front, on both sides
Transparent case back made of glass, on the interior
Case back screw-fastened
Meet the technical requirements for waterproofness, as set out in standard DIN 8310
up to 10

Hours, minutes, subsidiary seconds
Hand date
Moon phase display

Interior rotating bezel with logarithmic scale (slide-rule function)
Case diameter: 41 mm
Band : 22 mm
Case thickness: 13,2 mm
Weight without strap: 73 gramme
Charcoal grey dial
Indices coated with luminescent colour
Hour and minute hand coated with luminescent colour