Sinn

UX SDR EZM 2B

Reference Number :

403.050

Series : Diving Watch

Retail: $2,968

(As of: 03/2025)

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 Sinn UX SDR is more than just a tool; it's an extension of the diver's will, a silent, steadfast partner in the unforgiving depths. The submarine steel case whispers of resilience. The watch's capability to reach 5000m, goes far beyond what a human can do unassisted. The black dial is all business – pure, functional legibility, enhanced by the oil-filled case that banishes reflections. Every detail, from the cleverly positioned crown to the temperature-stabilized quartz movement, is a testament to Sinn's unwavering commitment to purpose-built design. It doesn't shout for attention; it earns it through sheer capability. And that captive, hardened bezel? It’s not just turning; it's counting down precious moments in a world where seconds matter. The UX SDR doesn’t just tell time; it embodies the spirit of underwater exploration, a quiet assurance in the face of immense pressure. Its extreme resistance to temperature change makes it suitable for many other conditions as well.

DescriptionThe Sinn 403.050, designated UX SDR (EZM 2B), represents a pinnacle of dive watch engineering. Its construction begins with a 44mm diameter case, milled from high-strength, bead-blasted German submarine steel. This material choice provides exceptional resistance to seawater corrosion and overall robustness. The case thickness measures 13.3mm, contributing to the watch's substantial presence, while the band lug width is standardized at 22mm. A screw-fastened case back and screwable crown, positioned at 4 o'clock to enhance comfort and prevent snagging, are integral to the watch's water resistance. Rigorous testing based on European diving equipment standards EN 250 / EN14143, as well as DIN 8306 and 8310, confirms its pressure resistance to an extraordinary 5000m diving depth (500 bar), certified by an independant testing facility. The watch's design also incorporates low-pressure resistance.

Powering the UX SDR is the ETA 955.652, a high-precision, temperature-stabilized quartz movement. This movement utilizes seven bearing jewels and features a seconds stop function for precise time setting. Anti-magnetic properties are assured, conforming to DIN 8309 standards. The movement is encased within Sinn's HYDRO Technology, wherein the case is filled with a specialized oil. This oil filling achieves multiple objectives: it eliminates underwater reflection at any viewing angle, prevents fogging, and further contributes to the extreme pressure resistance. The movement's temperature stabilization, combined with a long-life lithium battery, ensures functional reliability across a wide temperature range, from –20 °C up to +60 °C. The matte black dial is designed for mission timer legibility, with indices and hands coated with luminescent material. A captive diver's bezel, featuring minute ratcheting and a luminous key mark, is further enhanced by a Black Hard Coating applied over a TEGIMENT Technology base, significantly increasing its scratch resistance. The watch crystal is manufactured using Sapphire.

GenderMen

SignaturesSinn

Country of OriginGermany

Case Size44 mm

MovementQuartz

CaliberETA 955.652

FunctionsHours, Minutes, Seconds, Date

Case MaterialsSubmarine Steel

Bezel MaterialsSubmarine Steel

Lug MaterialsSubmarine Steel

Case BackSolid

CrownScrew Down