Sinn 503.EZM1

Sinn 503.EZM1 / 300M / Men's / Automatic / Chronograph / Titanium / 40 mm / 503.EZM1 / Date

Basic Info Listing code : OEH033 Brand : Sinn Reference number : 503.EZM1 Dealer product code : 637054001 Movement : Automatic Case material : Titanium Bracelet material : Titanium Year of production : Unknown Condition : Used (Very good) Scope of delivery : No original box, no original papers Gender : Men's watch/Unisex Location : Switzerland, Geneve Price : CHF6,851 Availability : Item is in stock Caliber Movement : Automatic Caliber/movement : 5100 Number of jewels : 17 Frequency : 28800 A/h Case Case material : Titanium Case diameter : 40 mm Thickness : 16 mm Water resistance : 30 ATM Bezel material : Titanium Crystal : Sapphire crystal Dial : Black Dial numerals : Lines Bracelet/strap Bracelet material : Titanium Bracelet color : Steel Bracelet length : 180 mm Clasp : Fold clasp Clasp material : Titanium Functions Chronograph, Date Other Central seconds, Luminous hands, Rotating Bezel, Crown Left, Only Original Parts, Luminous indices, Vintage The Sinn 503.EZM1 is a rugged and highly specialized tool watch developed for professional use in extreme conditions. Part of Sinn’s renowned EZM (Einsatzzeitmesser) series, it was originally designed at the request of ZUZ, a special German customs unit tasked with countering violent crime. The 40mm titanium case offers both strength and lightness, making it suitable for demanding field operations. Powered by the now-discontinued Lemania 5100 automatic movement, the watch has been purposefully simplified—removing unnecessary functions and focusing on a clean, four-hand central display for maximum legibility. It features a rotating bezel, chronograph, and date display, all designed for practical use. This particular piece has been overhauled but retains the vintage character, with signs of age and wear intentionally preserved to maintain its historical authenticity. Its durability, mission-driven design, and rarity make it a prized model among collectors and professionals alike.