857 Flieger Leather Watch

857 Series: pilot's watches with magnetic field protection.

The Watch
Topped with a flat sapphire crystal with double anti-reflective coating, the round case is crafted in stainless steel. It measures 43 mm in diameter, 12 mm thick, and weighs 90 grams without the strap. The black dial features luminescent hands, Arabic numerals, and white indices that glow in the dark, along with a date window at 4:00. The case back is screwed down and guaranteed nickel-free. The crown at 3:00 is also screwed down.

The case features a black bidirectional rotating bezel that provides a visual countdown function. To prevent accidental rotation, the bezel is secured to the case in such a way that it cannot be lost.

This watch comes fitted with a black leather strap with a pin buckle. This model is water-resistant to 20 atmospheres, approximately 200 meters. It is suitable for swimming and scuba diving.

Specific Technical Features
The case and bezel have undergone TEGIMENT anti-impact treatment. This surface-hardening technology effectively protects the stainless steel against scratches.

This watch also features Sinn's patented Ar dehumidification technology. This technology slows the aging process of the watch's internal components, extending the movement's service life. It also prevents condensation from forming on the crystal during sudden temperature changes.

It also provides protection against magnetic fields up to 80,000 A/m, thanks to a dial and double case back made from soft magnetic material. This construction prevents the watch from being disrupted or stopped when exposed to magnetic fields generated by electric motors or loudspeakers.

The Movement
This watch houses a Swiss automatic self-winding movement, the Sellita SW300-1. This 25-jewel caliber displays hours, minutes, seconds, and the date in a window. It is equipped with the Stop-Second device for precise time-setting to the second. This movement beats at 28,800 A/h with a power reserve of 42 hours.