The Omega Speedmaster reference 3575.20.00 features a moonphase complication within the established asymmetric stainless steel case. The model is differentiated from standard moonwatches by utilizing a solid 18K white gold tachymeter bezel, complemented with an ivory dial and thermally blued steel Broad Arrow handset. This four-register layout allocates the twelve o'clock position to a combined moonphase disc and pointer-date indicator, maintaining the standard chronograph readouts at three, six, and nine o'clock.
Powering the watch is a manual-wind Caliber 1866, a movement erived from the Lemania-based Caliber 1861 that served standard Moonwatch models of the era. Omega engineers modified this cam-actuated base caliber by adding a dedicated module for the lunar cycle and date wheel, necessitating the integration of inset push-correctors into the side of the 42mm case.
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: 9 / 10 | Mint Condition Production: 2021 Contents: Full-set Genre: Sports Chronograph
Size: 42mm Thickness: approx. 14m Lug Width: 20mm
Case: Stainless steel, asymmetrical case, brushed sides and mirrored facets Bezel: 18K white gold, fixed tachymeter insert, minor wear Dial: white dial, applied blue markers, moonphase and date sub-dial at 12 o'clock Hands: Blued steel broad arrow hands
Crown: Stainless steel, push/pull crown and hidden pushers Crystal: Domed sapphire crystal Bracelet: Stainless steel bracelet Caseback: Stainless steel, solid, screw-down Movement: Manual Wind Chronograph Caliber: 1866