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Sinn 103 Series Ref. 103


Pre-Owned Sinn 41mm 103 Series, Black Dial, Stainless Steel Bracelet, Ref. 103

The models in Sinn’s 103 series make it instantly clear that these timepieces were created for uncompromising functionality. Following company tradition, the design of these watches reminds one of the instruments in an airplane cockpit. After all, the first timepieces by the company’s founder were mechanical airplane cockpit clocks for professional use.

The term ‘pilot watch’ is used by watch manufacturers in an inconsistent and unclear way. The general understanding is that a pilot watch includes certain traditional design features such as a black-and-white dial with a striking, triangular 12 o’clock markings. Sinn provides the clearest possible readability for pilot watches.  They include a rotating bezel that can be rotated on both sides with at least one luminescent marking for flight operations in accordance with both visual flight rules and instrument flight rules. The minute-by-minute detent must also provide tactile feedback. A standardized pilot’s rotating bezel must be operable with gloves typical for flight operations. The case is also pressure resistant to 20 bar, which is intended to secure the watch for both water pressure and air pressure while flying. The caseback is screw fastened and the crown is also screwed in place. Model 103 St includes a chronograph as well as day and date features, making it a very capable watch for daily wear and extracurricular activities.

Only 1 left in stock

Categories: , , SKU: 210000006884

Additional information

Band Material

Stainless Steel

Band Type



Rotating, Bi-directional, Aluminum, 60-Minute

Box and Papers

No Box | No Papers




Conepto C99001

Case Material

Stainless Steel

Case Size





Date, Day, Chronograph


Screw Down

Crystal Material


Dial Color





40mm – 42mm


1-Year Watchworks Guarantee

Item ID0006884
Model #103
Model Name103


Helmut Sinn, an instructor for blind flight and former World War II pilot, founded the company “Helmut Sinn Spezialuhren” in Frankfurt am Main in 1961. The company’s core business is the manufacture of navigation clocks and pilot chronographs.

In 1985, German physicist and astronaut Professor Dr. Reinhard Furrer wore the 140 S on his wrist during the D-1 spacelab mission and proved that the self-winding mechanism of a mechanical wristwatch works even in weightless conditions.

On the second German Spacelab mission, the D-2, the 142 space chronograph accompanied the crew during their 10 days in space. The watch flew 6.7 million kilometres and orbited the earth 160 times on board the NASA space shuttle Columbia.