Sinn

U50 HYDRO SDR

Reference Number :

1051.040

Series : Diving Watch

Retail: $2,548

(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 TakeBehold the U50 HYDRO SDR, not just a watch, but a testament to Sinn's dedication to functional precision. This isn't your average desk diver; it's a deep-sea companion, built like a miniature submarine. The German Submarine Steel case whispers strength, and the HYDRO tech is pure genius – imagine, no glare, no fog, just crystal-clear viewing at any angle, even at crushing depths of 5,000 meters. The Ronda 715 Li quartz movement, nestled in its oil bath, ticks away reliably. The matte black dial with a high-visibility layout. It’s a perfect choice for someone wanting clarity. The bold red strap integrates seamlessly, and even small details, like the 4 o'clock crown placement, elevate the overall experience. It’s a tool, no doubt, certified to withstand ridiculous pressure and meet rigorous diving standards, but it's also got a subtle, purposeful cool.

DescriptionThe Sinn U50 HYDRO SDR, reference 1051.040, is a purpose-built diving instrument engineered for extreme conditions. Its 41mm case and screw-down crown are constructed from high-strength, bead-blasted German Submarine Steel, renowned for its exceptional seawater resistance and non-magnetic properties. This material choice guarantees durability and reliability in demanding maritime environments. The case back is securely screw-fastened. The overall construction allows a weight of 72 grams without the strap attached. The incorporated red silicone strap is carefully integrated into the U50's case. This watch is designed for divers, so it utilizes a large, easy to use, bead-blasted stainless steel folding clasp.

The core of the U50 HYDRO SDR's underwater performance lies in its HYDRO Technology. This involves a specialized oil filling within the case, which accomplishes multiple objectives. It provides absolute freedom from fogging, a crucial factor for maintaining visibility in varying temperatures and humidities. Moreover, this fluid fill ensures the watch remains reflection-free underwater, allowing for clear readability from any viewing angle. The oil also creates an incredibly pressure-resistant environment, enabling the watch to withstand depths of 5,000 meters (500 bar), as certified by DNV. A captive diver's bezel, featuring minute ratcheting, is incorporated. The bezel itself uses a Black Hard Coating applied on a TEGIMENT Technology basis, to prevent flaking. Powering this instrument is a Swiss-made Ronda 715 Li quartz movement, chosen specifically for its ability to function within the oil-filled environment. This long lasting lithium-battery-powered movement includes an End of Life (EOL) function to indicate when battery replacement is nearing. The movemnent is rated to perform between temperatures of –20 °C to +60 °C and includes 5 bearing jewels. The movement is Anti-magnetic, as dictated by DIN 8309 guidelines. The watch features hours, minutes, and seconds hands, along with a date display, positioned strategically for clear reading. The dial is a matte black, with indices and hands coated in a luminescent material for low-light visibility. The crown's placement at 4 o'clock is a design choice to improve comfort during activities that involve wrist flexion. The watch meets multiple quality control tests including: technical requirements for water resistance (DIN 8310), diving norm (DIN 8306) and European diving equipment standards (EN 250 / EN14143). It is also rated as low pressure resistant. Band lug width: 20 mm, Case thickness: 11.8 mm.

GenderMen

SignaturesSinn

Country of OriginGermany

Case Size41 mm

MovementQuartz

CaliberRonda 715 Li

FunctionsHours, Minutes, Seconds, Date

Case MaterialsSubmarine Steel

Bezel MaterialsSubmarine Steel

Lug MaterialsSubmarine Steel

Case BackSolid

CrownScrew Down