Introduced in the late 1990s, the Mark 40 expanded the Speedmaster line beyond standard manual-wind chronographs into multi-complication watches. The matte grey dial integrates a triple calendar layout with day and month apertures at 12 o'clock, alongside a distinct yellow pointer date hand and a blue-and-black 24-hour sub-dial at 9 o'clock. The dial overall mimics the look and feel of aircraft instruments.
Operating inside the 39mm stainless steel case is the self-winding Omega Caliber 1151, a Valjoux 7751-based movement beating at 28,800 vibrations per hour with approximately 44-hour power reserve.
Founded in 1848 by Louis Brandt in La Chaux-de-Fonds, Switzerland, the company that would become Omega established its identity with the 1894 introduction of the 19-ligne 'Omega' calibre. This movement was a landmark in industrial watchmaking, utilizing interchangeable components to streamline production and repair—a philosophy of accessible precision that continues to define the brand.
Omega cemented its reputation for robust accuracy through its role as the Official Timekeeper for the Olympic Games since 1932 and, most famously, through the Speedmaster Professional's flight qualification by NASA, which culminated in its journey to the Moon.
In the modern era, the brand's most significant contribution has been the industrialization of the co-axial escapement, an invention by Dr. George Daniels that fundamentally reduces friction within the calibre for superior long-term chronometric stability. Typified by purpose-driven design, Omega's collections—from the abyssal-depth Seamaster to the iconic Speedmaster—are archetypes of the professional tool watch, balancing legible aesthetics with advanced material science and anti-magnetic properties through its Master Chronometer certification.
Overall Grade: 8 / 10 | Great Condition, Visible Wear Production: est. 1998 Contents: Watch Only Genre: Vintage Sports Chronograph
Size: 39mm Thickness: approx. 14mm Lug Width: approx. 18mm
Case: Stainless steel, mirrored and brushed finish, twisted lugs, visible wear Bezel: Stainless steel, fixed, black aluminum tachymeter insert, visible wear Dial: Dark grey dial, printed numerals, triple calendar chronograph layout Hands: Lumed sword hands, red chrono hand, yellow airplane-tipped date hand
Crown: Stainless steel, push/pull crown and pushers, visible wear Crystal: Sapphire crystal, visible wear Bracelet: Stainless steel bracelet, visible wear Caseback: Stainless steel, solid, snap-on, visible wear Movement: Automatic Chronograph Caliber: Caliber 1151