Sinn Watch 903 St B E Alligator. A unique breed of a vintage navigation chronograph. The Sinn 903 St B E is purposeful to those who adore timepieces with performing analogue calculations. The dark blue dial is the perfect companion for the ivory embellished indices and hands which have been treated with a luminous coating. With remarkable attention to detail and a bold injection of colour, the timepiece is a credit to the highly skilled design engineers courtesy of the Sinn Watch Company. The additional crown can be used for rotation of the slide rule bezel with logarithmic scale. Mathematical operations such as division, multiplication and cross-multiplication along with fuel consumption, speed and distance are all possible within one device echoing a collection of concepts adored by Sinn devotees worldwide. Sinn have chosen wearer friendly dimensions of 41mm in diameter and a thickness of 14.5mm. The highly skilled instrument is water resistant to 100 meters, bears shock resistance and is also anti magnetic and low pressure resistant. The 903 has also undergone tests consisting of a hammer blow at the speed of 4.43 meters per second, representing the watch being dropped by 1 meter onto a wooden floor. The regulation of the Sinn timepieces shock absorbing qualities ensures that the instrument ticks over with no more than a deviation of plus or minus 60 seconds per day. Encased within a polished and satinized stainless steel structure, the case offers a high degree of purity, blended with corrosion resistant properties and consisting of a chemical composition defined by narrow tolerances. Set in a deep blue hued dial, a chronograph display with subsidiary seconds decorates the dial, accompanied by luminescent hour indexes in the form of baton style markers and an understated date aperture revealing itself between the 4 and 5 o clock hour mark. The Sinn 903 St B E is finished on a marine blue cowhide strap with alligator embossing and polished stainless steel pin buckle with a contrasting white seam to complete a sporty yet professional look. Supplier model number 903.045
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