Sinn

UX SDR EZM 2B TEGIMENT

Reference Number :

403.080

Series : Diving Watch

Retail: $3,281

(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 isn't just a watch; it's an underwater instrument. Forget reflections, forget depth concerns – this timepiece, with its oil-filled case, laughs in the face of 500 bar of pressure. Crafted from hardened submarine steel, and fully Tegimented, this is no ordinary diver. That robust 44mm case houses a hyper-accurate, temperature-stabilized quartz movement. It is the kind of no-nonsense, mission-ready tool that screams capability. The matte black dial and bold, lumed markers shout legibility, while the offset crown hints at its ergonomic design, crafted for comfort during demanding conditions. This is a serious piece of kit, designed for someone needing reliable timekeeping. The SDR variant adds its distinctive black bezel for an even more aggressive tool-watch aesthetic.

DescriptionThe Sinn 403.080, designated as the UX SDR (EZM 2B), is engineered for extreme underwater performance. Its core construction utilizes high-strength, bead-blasted German submarine steel, providing exceptional resistance to seawater corrosion. The case, measuring 44mm in diameter and 13.3mm in thickness, features a screw-fastened case back and a screwable crown positioned at 4 o'clock. This crown placement is a deliberate design choice to minimize any potential pressure or discomfort on the back of the hand during active use. The entire assembly, including the solid, bead-blasted stainless steel bracelet, has undergone Sinn's TEGIMENT hardening process, dramatically increasing its surface hardness and scratch resistance. The watch weighs 105 grams without the strap.

Powering the UX SDR is the ETA 955.652 high-precision, temperature-stabilized quartz movement. This movement features seven bearing jewels and a seconds stop function for precise time setting. Furthermore, it offers anti-magnetic properties as defined by DIN 8309 standards. Sinn's proprietary HYDRO Technology is central to the watch’s unparalleled legibility. The case is filled with a specialized oil, which negates refraction underwater, ensuring clarity from any viewing angle and prevents fogging. The sapphire crystal glass is anti-reflective on both sides. The combination of the HYDRO Technology and the robust construction permits certification of water and pressure resistance to a diving depth of 5000 meters (500 bar) by an independent institute. A captive diver's bezel, featuring minute ratcheting and a luminous key mark, features a Black Hard Coating applied over a TEGIMENT Technology base, providing extra durability. Functionality is maintained within a temperature range of –20 °C to +60 °C. The matte black dial maintains a mission timer design. Indices and the hour, minute, and second hands are coated with luminescent color. Meets standards DIN 8310, DIN 8306, EN 250, and EN14143. Band lug width is 22mm.

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