Omega Speedmaster Triple Date | 39mm Day-Date | Blue Dial | Ref. 3521.80

The Omega Speedmaster Ref. 3521.80 is a distinctive automatic variation of the Speedmaster, combining the collection’s signature chronograph design with a highly functional triple-calendar display. The watch features a compact 39mm stainless-steel case, stainless-steel tachymeter bezel, blue dial, and matching stainless-steel bracelet, giving it a sportier and more wearable profile than the traditional 42mm Moonwatch.

The blue dial is the standout feature of this reference, featuring applied hour markers, luminous hands, and three recessed subdials. Day and month apertures are positioned at 12 o’clock, while the date is displayed around the outer edge of the dial and indicated by a dedicated hand with a crescent-shaped tip. Together with the chronograph registers, this creates the characteristic multi-function layout that earned the model its “Triple Date” nickname.

Condition

Please review the photos carefully for an accurate representation. Light scratches, bracelet wear, bezel wear, crystal wear, dial aging, or other signs of use consistent with age may be present and do not affect functionality. The watch presents well overall with expected wear for its age.

Technical Data

• Reference: 3521.80

• Model: Omega Speedmaster Triple Date / Day-Date

• Case Diameter: Approximately 39mm

• Case Material: Stainless Steel

• Bezel: Stainless-Steel Tachymeter Bezel

• Dial: Blue Dial with Applied Hour Markers

• Hands: Luminous Hands with Dedicated Pointer Date Hand

• Crystal: Scratch-Resistant Sapphire Crystal

• Calendar: Day and Month Windows with Pointer Date Display

• Bracelet: Stainless-Steel Omega Bracelet

• Movement: Omega Calibre 1151 Automatic Chronograph

• Power Reserve: Approximately 44 Hours

• Frequency: 28,800 Vibrations Per Hour

• Chronograph: Central Chronograph Seconds with Multiple Timing Registers

• Functions: Hours, Minutes, Small Seconds, Chronograph, Day, Date, Month and Day/Night Indication

• Water Resistance: Originally rated to approximately 30 meters; current water resistance not guaranteed