Sinn 857 SEK Frankfurt am Main Special Edition – Special Operations Watch to Celebrate the 40th Anniversary of SEK Frankfurt am Main

The Frankfurt am Main special police unit (SEK  Spezialeinsatzkommando) was officially founded in 1974. On the occasion of its 40th anniversary, Sinn Spezialuhren and the SEK Frankfurt am Main have come together to develop the SEK 857 SEK Frankfurt am Main special-operations watch.

Forty years and counting: SEK Frankfurt am Main decided to mark the occasion with a special watch. To develop the watch, SEK Frankfurt am Main, which has earned an exceptional reputation throughout and beyond Germany, turned to Sinn Spezialuhren without hesitation. After all, Sinn Spezialuhren is also highly respected throughout the world, particularly for its timepieces developed purely with the specific functionality and operational requirements in mind. Close collaboration was therefore an obvious solution. The two Frankfurt institutions also have a close association with the city of Frankfurt. This is expressed symbolically on the dial of the special watch with an adapted coat of arms of the SEK – the Frankfurt eagle and sword.

The operational requirements formulated by SEK members through a specifications book and implemented by Sinn Spezialuhren served as the technical basis for the development of the 857 SEK Frankfurt am Main special edition. The case is made of bead-blasted stainless steel and has a diameter of 43 mm. The surface was hardened with TEGIMENT Technology, ensuring that the case is scratch-resistant. The range of features also includes Ar-Dehumidifying Technology for greater functional reliability and freedom from fogging as well as magnetic field protection of up to 80,000 A/m. The rotating captive pilot’s bezel with minute ratcheting is securely connected to the case. The watch is fitted with high-quality sapphire crystal glass, pressure-resistant to 20 bar (= 200 m water depth) and resistant to low pressure.

The 857 SEK Frankfurt am Main special edition was created on a one-off basis and was not freely available for purchase. As an unofficial piece of equipment, it was available exclusively to active or former SEK members.

Lothar Schmidt, owner and general manager of Sinn Spezialuhren, handed
over the special operational watches to Dirk Fornoff, head of the
special units/special forces division of the Frankfurt police
headquarters, on 9 July 2014.

The name Sinn Spezialuhren represents functionally robust, mechanical timepieces, which are used by pilots, divers and the GSG 9 maritime unit, as well as many other professionals. With technologies such as DIAPAL, Ar-Dehumidifying Technology, HYDRO, TEGIMENT and magnetic field protection, in particular, SINN watches continually show their durability, longevity, quality and precision both in everyday life and in extreme situations.

During the development process, SINN Spezialuhren firmly bases the design of its watches on the specific functionality required. Selected pilot watches are tested and certified to the technical standard for pilot watches (Technischer Standard Fliegeruhren – TESTAF) by Aachen University of Applied Sciences. The TESTAF, developed at the initiative of Sinn Spezialuhren, ensures that a pilot watch meets all time measurement requirements during flight operations in accordance with visual and instrument flight rules and is qualified for professional use to the highest degree.

Technical details
Model: 857 SEK Frankfurt am Main

Mechanical Movement, SW300-1
Self-winding mechanism
25 bearing jewels
28.800 semi-oscillations per hour
Seconds stop function
Shock resistant as per DIN 8308
Anti-magnetic as per DIN 8309

Case made of stainless steel, bead-blasted
Sapphire crystal glass in front, anti-reflective on both sides
Case back screw-fastened, nickel-free
Crown screwable
Water resistant as per DIN 8310
Pressure-resistant to 20 bar (= 200 m water depth)
Low pressure resistant

Hours, minutes, seconds
Date display
Pilot’s bezel with minute ratcheting and luminous key mark

SINN Technologies
TEGIMENT Technology, therefore especially scratch-resistant
Captive bezel
Ar-Dehumidifying Technology enhances functional reliability and freedom from fogging
Magnetic Field Protection up to 80,000 A/m

Dimensions and Weight
Case diameter: 43 mm
Band lug width: 22 mm
Case thickness: 12 mm
Weight without strap: 90 gramme

Dial and Hands
Matte black dial
Numbers and indices coated with luminescent colour
Hour and minute hand coated with luminescent colour

3 years

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.