Omega Speedmaster Moonwatch | “Hesalite Sandwich” Display CasebackI Ref. 3572.50

About This Watch

The Omega Speedmaster Professional Moonwatch Ref. 3572.50 is a noteworthy variation of the classic Moonwatch design, combining the traditional front Hesalite crystal with a sapphire exhibition caseback — a configuration affectionately known as the “Hesalite Sandwich”. This reference retains the iconic elements of the Speedmaster lineage while offering the rare benefit of viewing the beautifully finished manual-winding movement through the transparent back. Housed in a 42 mm stainless steel case, the watch preserves the familiar Speedmaster proportions and professional tool-watch aesthetic. The black dial features the signature 3-6-9 sub-dial layout with luminous hands and hour markers, paired with a fixed stainless steel tachymeter bezel — all hallmarks of Omega’s chronograph heritage. This reference represents a bridge between traditional Moonwatch design and collector-friendly detail, offering fans of the Speedmaster an opportunity to enjoy the historic manual movement in full view without sacrificing the classic Hesalite crystal on the front. Condition Good overall condition. Please review all photos and zoom in if necessary; the watch shows light signs of wear consistent with age, functions properly, and the dial displays light spotting typical for this reference. Water resistance is not guaranteed due to age. Technical Data • Reference: 3572.50 • Case Diameter: 42 mm • Case Material: Stainless steel • Crystal: Hesalite (front) / Sapphire (display caseback) • Dial: Black with luminous markers • Movement: Manual winding chronograph (Calibre 1863) • Functions: Hours, minutes, small seconds, chronograph, tachymeter • Bracelet/Strap: Stainless steel