£2,250.00
The Omega Speedmaster Day-Date reference 3521.80.00 belongs to a significant chapter in the evolution of the Speedmaster line during the 1990s, when Omega broadened the family beyond the manually wound Professional Moonwatch. Introduced in the mid-1990s, this reference formed part of what collectors often term the “Triple Date” series, offering a more complicated and contemporary alternative to the traditional chronograph format. Its 39 mm stainless steel case, blue dial with triple calendar indications, and tachymeter bezel reflect the aesthetic language of the period while remaining unmistakably Speedmaster in character.
Mechanically, the reference is powered by Omega’s Calibre 1151, an automatic chronograph movement derived from the Valjoux 7751 architecture. This calibre provides day and month apertures beneath 12 o’clock, a central pointer date, subsidiary running seconds with 24-hour indication, and a 12-hour chronograph counter. Beating at 28,800 vibrations per hour and offering approximately 44 hours of power reserve, the 1151 represents a robust and practical movement choice — engineered for reliability rather than haute horlogerie display, and entirely in keeping with Omega’s utilitarian chronograph heritage.
Within the broader history of the Speedmaster, the 3521.80.00 marks a transitional era before the brand’s widespread adoption of the Co-Axial escapement and the modern Master Chronometer programme. Produced primarily through the late 1990s and early 2000s, it captures a moment when Omega combined traditional Swiss cam-operated chronograph engineering with full calendar functionality in an accessible, wearable format. Today, these models stand as representative examples of Omega’s late-20th-century technical versatility, bridging classical chronograph design and contemporary daily practicality.
| Complications | Day, Date, Month and Chronograph |
|---|---|
| Movement | Omega Cal. 1151 |
| Reference | 3521.80.00 |
| Delivery | Watch only |
| Case Size | 39mm (excluding crown) |
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