Chronograph Watch - Model 103 ST

The traditional pilot chronograph

Sinn Model Family 103 makes its reason for being very apparent at first glance. In keeping with the company tradition, the design principles that make up a board instrument were the role models for these timekeepers as well. The first timepieces that company founder Helmut Sinn created were classic, mechanical airplane board clocks for professional use.

Technical Data
Model 103 ST

Movement:
- Valjoux 7750
- Mechanical lever movement with self-winding mechanism
- 25 jewels and 28.800 vibrations per hour
- Antimagnetic according to DIN 8309
- Shock resistance according to DIN 8308
- Hand setting with second hand stop
- Quick adjustment of day and date
- Chronograph (stop function)
- Metering range of chronograph: 12 hours

Display/Functions:
- Inactive luminous hands and numerals
- Hours, minutes, seconds
- Date and day in dial aperture
- Sweep seconds, 30-minute recorder and 12-hour recorder
- Anodized aluminum pilot’s rotating bezel and luminous point

Case:
- Stainless steel, polished
- Screwed-on case back
- Screw-down crown with flank protection
- Shock resistant, domed acrylic crystal
- Water resistant according to DIN 8310
- Pressure resistant up to 20 bar = approx 200 m water depth

Measurements:
- Case diameter 41 mm
- Lug width 20mm

Guarantee:
- 2 years

Strap:
- Leather or bracelet