Sinn - U50 B

The U50 B is a precision instrument for divers and at the same time a bold statement in design. The striking matt-blue dial immediately draws the eye, signalling the highest level of professionalism and underlining the uncompromising functionality of this watch – not least thanks to the white, luminous indices and hands, which provide a perfect contrast. The result: a harmonious overall appearance with outstanding readability.

In true SINN tradition, the U50 B combines well-conceived design with technical excellence: the case and crown are made of high-strength, seawater-resistant submarine steel with the highest non-magnetic quality – a material otherwise reserved for extreme maritime applications. The captive diver’s bezel proves to be especially scratch-resistant, as it has been further hardened with TEGIMENT Technology. A practical detail: the crown is positioned at 4 o’clock to prevent pressure on the back of the hand.

Whether for ambitious dives or as a reliable companion in everyday life, the U50 B excels in every respect, as confirmed by independent testing. Its suitability for underwater use has been verified and certified by an independent institute.

Movement

• SW300-1
• Self-winding mechanism
• 25 bearing jewels
• 28,800 semi-oscillations per hour
• Seconds stop function
• Anti-magnetic as per DIN 8309

Case

• Case made of German Submarine Steel, bead-blasted
• Sapphire crystal glass in front, anti-reflective on both sides
• Case back screw-fastened
• Crown screwable
• Meet the technical requirements for waterproofness, as set out in standard DIN 8310
• Waterproof and pressure-resistant to 500 m diving depth (= 50 bar), certified by DNV GL
• According to the technical demands for the diving norm DIN 8306
• Tested based on European diving equipment standards EN 250 / EN14143 and certified by DNV GL
• Low pressure resistant

Functions

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

Dial and Hands

• Matte blue dial
• Indices coated with luminescent colour
• Hour, minute and second hand coated with luminescent colour

SINN Technologies

• Bezel has TEGIMENT Technology, therefore especially scratch-resistant
• Captive bezel

• Case diameter: 41 mm
• Band lug width: 20 mm
• Case thickness: 11.15 mm
• Weight without strap: 74 grams