Sinn

U50 HYDRO S

Reference Number :

1051.020

Series : Diving Watch

Retail: $2,652

(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 HYDRO S, feels like a piece of advanced diving equipment more so than merely a tool watch. The 41mm German Submarine Steel case, completely coated in black, gives off a purposeful and quietly aggressive presence. The watch's HYDRO technology creates something truly unique. Seeing the dial, perfectly crisp and legible from impossible angles underwater due to the oil-filled case, is a revelation. The Sinn is completely unconcerned with depth, certified to an utterly insane 5,000 meters. The Ronda quartz within the movement isn't glamorous, however it is the perfect choice for something that demands total reliability, consistent temperature resistance. The offset crown at 4 o'clock completes the feeling that is of a watch that has been engineered to a singular purpose, no frills. It is just a great watch.

DescriptionThe Sinn U50 HYDRO S, reference 1051.020, is engineered for extreme underwater performance and durability. Its 41mm case and screw-down crown are constructed from high-strength, seawater-resistant German Submarine Steel, selected for its exceptional non-magnetic properties and resilience. The entire case, alongside the rotating bezel, features a Black Hard Coating applied over a TEGIMENT-hardened base. This process ensures the coating's integrity, preventing flaking that can occur with conventional coatings due to differing material hardness levels. The captive diver's bezel features minute ratcheting, providing precise timing for dives.

Inside, the U50 HYDRO S's defining feature is its HYDRO Technology. The watch case is oil-filled, which accomplishes multiple objectives. It provides complete freedom from internal fogging, ensures reflection-free readability underwater from any viewing angle, and imparts an impressive pressure resistance. DNV, an independent classification society, certifies the watch's water resistance to a diving depth of 5,000 meters (equivalent to 500 bar). They also test and certify its temperature resistance and functionality in accordance with European diving equipment standards EN 250 and EN14143, confirming its operational reliability between -20°C and +60°C. The utilization of HYDRO technology necessitates a quartz movement; therefore, the U50 HYDRO S uses a Swiss-made Ronda 715 Li quartz movement. The movement is equipped with a long lasting lithium battery along with an End-of-Life (EOL) function, which gives indication to the wearer the battery will need replacing soon. The movement provides timekeeping functions (hours, minutes, seconds) and a date display, positioned discreetly. The dial is matte black, maximizing legibility, with indices and hands coated in a luminescent material.

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