Technical mastery meets pilot-inspired design — the Omega Speedmaster Mark 40 Ref. 3520.50 stands apart as one of the few Speedmasters to feature a triple-calendar chronograph, displaying day, date, and month alongside its 12-hour chronograph and 24-hour indicator.
The 39 mm stainless-steel case with a polished tachymeter bezel frames a black dial accented by multi-coloured sub-dials — a nod to cockpit instrumentation. This distinctive design offers exceptional legibility while celebrating the Speedmaster’s aviation heritage.
Powered by the OMEGA Calibre 1151 automatic movement (based on the Valjoux 7751), it delivers reliable chronograph precision with a ~44-hour power reserve. Paired with a sapphire crystal and stainless-steel bracelet, it balances technical complexity with everyday wearability.
Specifications
- Brand: OMEGA
- Model: Speedmaster Mark 40
- Reference: 3520.50
- Case Size: 39 mm
- Case Material: Stainless Steel (Polished Finish)
- Dial: Black with multi-colour sub-dials, day/date/month displays, and 24-hour indicator
- Crystal: Sapphire Crystal
- Movement: Automatic Chronograph – Calibre 1151 (Triple-Calendar, 44-hour power reserve)
- Bracelet: Stainless Steel Bracelet with Folding Clasp
- Water Resistance: 30 metres
- Condition: Light traces of usage and surface marks, but overall, in very good condition
- Accessories: Watch only
- 7-day grace period - (Returns and Warranties)
- Delivery timeframe: 2 to 3 weeks Shipping policy – Timeless Luxury
Key Features
- Rare Triple-Calendar Chronograph — displays day, date, and month on the dial
- Distinctive Pilot-Style Design — colourful sub-dials inspired by aircraft instruments
- Automatic Calibre 1151 — robust, reliable, and mechanically sophisticated
- Classic 39 mm Proportion — ideal balance of presence and comfort
- Sapphire Crystal & Steel Build — ensures long-term durability and clarity
The Speedmaster Mark 40 Ref. 3520.50 captures Omega’s bold experimentation of the 1990s — blending mechanical complexity, aviation styling, and everyday practicality in a compact case. A standout piece for collectors seeking a Speedmaster with true technical flair.
"Style is Timeless"