Omega Speedmaster Speedmaster Professional Moonwatch Sapphire Sandwich / Strap
Reference 3873.50.31
About this watch
The Omega Speedmaster Professional Moonwatch Sapphire Sandwich, also known as the 3873.50.31, is a testament to the brand's rich history and commitment to precision. This luxury watch features a stunning black dial with contrasting white stick and dot indexes, giving it a classic yet modern vibe suitable for both formal and casual occasions. The round stainless-steel case strikes a perfect balance between presence and elegance, measuring 42mm in diameter. A sapphire crystal on both the front and back of the watch enhances durability and provides a stunning view of the intricate movement through the open case back. With its iconic design, reliable Omega caliber 1863 movement, and versatile wearability, this watch earns its place in any collection. Whether you're a history buff, a watch connoisseur, or someone looking to elevate your style, the Speedmaster is a worthy companion. It's not just about telling time; it's about cherishing every moment.
Key Features
- Omega caliber 1863 movement
- 48-hour power reserve
- 21,600 vibrations per hour
- Chronograph function for timing events
- Sapphire crystal on front and back of the watch
- Water resistance up to 50 meters
- Leather strap with secure buckle
Specifications
- Brand
- Omega
- Family
- Speedmaster
- Model
- Speedmaster Professional Moonwatch Sapphire Sandwich / Strap
- Reference
- 3873.50.31
- Movement
- 1863
- Movement Features
-
- Hours, Minutes, Small Seconds
- Chronograph
- Case
- Stainless Steel 42mm
- Dial Color
- Black
- Crystal
- Sapphire
- Water Resistance
- 50
Current Listings

1999 Omega Speedmaster Broad Arrow Ref: 3594.50 with Box and Papers
This 1999 Omega Speedmaster Broad Arrow features a 42mm stainless steel case with a black chronograph dial and broad arrow hands.
- Condition: Excellent
- Case size: 42mm diameter
- Bracelet links: 15 + 840 end links
- Box and papers included: yes

1992 Omega Speedmaster Ref: 3590.50 with Patina
A 1992 Omega Speedmaster Ref: 3590.50 in excellent condition, featuring a 42mm case, black bezel, tritium dial with creamy yellow patina, and an Omega bracelet.
- Condition: Excellent with patina
- Case size: 42mm
- Serial number: 48,28X,XXX
- Bracelet links: 19 + 812 end links
Omega speedmaster 3221.30 chronograph automatic triple date mens watch box card
The Omega Speedmaster Triple Date combines classic design with advanced functionality, making it a perfect addition to any watch collection. It has a silver dial and is equipped with an automatic chronograph with triple date function.
- Condition: Excellent
- Bracket: Original Omega stainless steel bracelet
- Case size: 40mm diameter
- Case material: Stainless steel

Omega Speedmaster Moonwatch 1863 - Sapphire - 311.33.42.30.01.002 (excellent)
This Omega Speedmaster Professional Moonwatch 1863 Sapphire is a high-end watch featuring a 42mm stainless steel case, powered by the Omega 1863 Calibre.
- Condition: Excellent
- Case size: 42mm diameter
- Movement: Omega 1863 Calibre