Characterised by its thin and elegant case, the Trésor line was first launched by OMEGA in 1949 and housed the legendary 30mm calibre. More than half a century later, it continues to impress with one of today’s most advanced mechanical movements.This model has a 40 mm stainless steel case, which is presented on a black leather strap. The domed opaline silvery dial includes a date window at 6 o'clock as well as hands and indexes in 18K white gold. Inside, this De Ville Trésor is powered by the OMEGA Co-Axial Master Chronometer Calibre 8910 and is certified at the industry’s highest standard of precision, chronometric performance and magnetic resistance.

Features
Anti-magnetic: The movement is unaffected by exposure to strong magnetic fields, even those greater than 1.5 tesla (15,000 gauss).
Chronometer: Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).
Date: The day of the month, displayed in a window on a watch dial at the 3 or 6 o’clock position, or within a subdial at 9 o'clock.
Master Chronometer Certified: Guaranteeing the Swiss industry’s highest standard of precision, performance and magnetic-resistance, as set by the Swiss Federal Institute of Metrology (METAS).
Time zone function: Allows the hour hand to be easily adjusted to different time zones without stopping the watch.
Transparent caseback: A transparent caseback - frequently made of sapphire - makes it possible to see the movement inside the watch.

Technical Data
Reference: 435.13.40.21.02.001
Between lugs: 20 mm
Lug‑to‑lug: 44.80 mm
Thickness: 10.05 mm
Case diameter: 40 mm
Case: Steel
Dial colour: Silver
Crystal: Scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides
Water resistance: 3 bar (30 metres / 100 feet)
Total product weight (approx.): 57 g
Calibre: Omega 8910
Movement Type: Manual‑winding
Power reserve: 72 hours

Strap
Strap color: Black
Strap type: Leather strap
Strap surface: Alligator leather
Strap underside: Non‑grained calf leather
Buckle type: Pin buckle
Buckle material: Stainless steel