From https://www.omegawatches.com/:
"This vintage style timepiece is inspired by a classic 1939 OMEGA wristwatch that housed the famous 30-T2 manual-winding small seconds calibre.
The 39 mm case is crafted in stainless steel and features a vintage OMEGA logo embossed on the crown. Behind the domed sapphire crystal, the dial is made from Ag 925 silver, with blued hands and all markings transferred in dark blue. There is also a small-seconds subdial display at 6H.
Presented on a brown leather strap with a vintage OMEGA logo on the buckle, the timepiece is driven by the manual winding OMEGA Co-Axial Master Chronometer Calibre 8926. This sits behind a polished caseback with several engravings including, “NUMBERED EDITION”, “CO-AXIAL MASTER CHRONOMETER” and “CK 859” – a historic reference to stainless steel and the shape of the case."
Between lugs: 20 mm
Lug‑to‑lug: 46.2 mm
Thickness: 11.7 mm
Case diameter: 39 mm
Case: Steel
Dial color: Silver
Crystal: Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides
Water resistance: 3 bar (30 metres / 100 feet)
Total product weight (approx.): 66 g
Caliber: OMEGA 8926
Movement Type: Manual‑winding
Power reserve: 72 hours
Strap color: Brown
Strap type: Leather strap
Strap surface: Non‑grained calf leather
Strap underside: Calf leather
Buckle type: Pin buckle
Buckle material: Stainless steel