Sinn

U50 SDR

Reference Number :

1050.040

Series : Diving Watch

Retail: $2,740

(As of: 02/2025)

This watch is not for sale, this page is just for reference purposes only. If you would like to purchase this watch, please contact Sinn. If you are interested in selling this watch to us, you can contact us here.

Quick TakeThe U50 SDR isn't just a tool; it's an extension of the diver's resolve. Forged from German Submarine Steel, its 41mm bead-blasted case houses a relentless SW300-1 automatic movement. The dial, a deep matte black, provides clarity even in low visibility underwater adventures. The luminous indices and hands burn bright, piercing through the darkness. Feel the satisfying click of the TEGIMENT-hardened, captive diver's bezel – its minute ratcheting a countdown to adventure. Certified to 500 meters and tested against European diving standards, this isn't just about specs, although the watch has a 4 o'clock crown that's out of the way and won't dig into you. It is about confidence. This watch is a testament to resilience and precision. A steadfast companion beneath the waves, always ready to plunge deeper!

DescriptionThe Sinn U50 SDR, reference number 1050.040, represents a robust and meticulously engineered diving instrument. Its construction centers around a 41mm case crafted from bead-blasted, high-strength German Submarine Steel. This particular steel alloy is selected for its superior resistance to the corrosive effects of seawater, alongside its exceptional non-magnetic properties, exceeding the requirements of DIN 8309 for anti-magnetism. The case back is screw-fastened, further contributing to the overall structural integrity. A screwable crown, strategically positioned at 4 o'clock, minimizes potential discomfort on the wearer's wrist. The watch assembly has passed rigorous testing for water and pressure resistance that meet standards set out in DIN 8310 and is certified by DNV to a depth of 500 meters (50 bar). It is low-pressure resistant, too.

Powering the U50 SDR is the SW300-1 self-winding mechanical movement. This caliber features a seconds stop function, enabling precise time setting. It incorporates 25 bearing jewels to diminish friction and ensure efficient operation. The balance wheel oscillates at a frequency of 28,800 semi-oscillations per hour (4 Hz). Protecting the dial is a sapphire crystal, treated with an anti-reflective coating on both the interior and exterior surfaces to enhance visibility under varied lighting conditions. The U50's operational functions are streamlined to display hours, minutes, and seconds, as well as a date aperture. A captive diver's bezel features a minute ratcheting mechanism along with its Black Hard Coating, built upon a foundation of TEGIMENT Technology, significantly increasing its scratch resistance. This ensures the bezel's long term functional and aesthetic preservation. Testing of this dive watch has been completed based on European diving equipment standards EN 250 / EN14143, certified by DNV, and it meets the requirements of diving norm DIN 8306. The dial itself is a matte black, with indices and hands coated with luminescent material for low-light legibility. The band lug width measures 20 mm. Case thickness is maintained at 11.2 mm. The total weight of the watch head, without the strap, is 74 grams.

GenderMen

SignaturesSinn

Country of OriginGermany

Case Size41 mm

MovementAutomatic

CaliberSW300-1

FunctionsHours, Minutes, Seconds, Date

Case MaterialsSubmarine Steel

Bezel MaterialsSubmarine Steel

Lug MaterialsSubmarine Steel

Case BackSolid

CrownScrew Down