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.
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MSRP: $5,400
Market Price: $3,887

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

[WTS] Omega Speedmaster Ref 3510.12 Schumacher Yellow Dial – Not Your Average Speedy

Omega Speedmaster Ref 3510.12 Schumacher Yellow Dial – Not Your Average Speedy

Omega - 3510.12 · $2,850
This Omega Speedmaster Ref 3510.12 Schumacher Yellow Dial is a bold take on the classic Speedmaster with a vibrant yellow dial and compact automatic chronograph case.

  • Condition: Pre-owned, recently polished and serviced
  • Case size: 39mm diameter
  • Crystal type: Hesalite Crystal
  • Movement: Automatic chronograph movement (3220)
Posted at
May 1, 2026, 8:12 PM
Active
[WTS] OMEGA Speedmaster "Dark Side of the Moon" Apollo 8 Ref. 311.92.44.30.01.001 + Apollo 8 Gen2 Strap + Deployant Clasp - ULTIMATE SET! 🔥$10,000🔥

OMEGA Speedmaster "Dark Side of the Moon" Apollo 8 Ref. 311.92.44.30.01.001 + Apollo 8 Gen2 Strap + Deployant Clasp - ULTIMATE SET! 🔥$10,000🔥

OMEGA - 311.92.44.30.01.001 · $10,000
The OMEGA Speedmaster 'Dark Side of the Moon' Apollo 8 commemorates the 50th anniversary of the Apollo 8 mission, featuring a black ceramic case and a skeletonized dial representing the lunar surface.

  • Condition: UNWORN
  • Case material: black ceramic
  • Diameter: 44.25mm
  • Movement: Calibre 1869
Posted at
May 1, 2026, 8:11 PM
Active
[WTS] Omega Speedmaster Racing 40mm Steel Reverse Panda Dial 326.30.40.50.01.002 Box & Manual

Omega Speedmaster Racing 40mm Steel Reverse Panda Dial 326.30.40.50.01.002 Box & Manual

This Omega Speedmaster Racing features a stainless steel case, black reverse panda dial, and automatic mechanical movement.

  • Condition: Preowned with scratches on the case, bracelet and buckle
  • Case material: Stainless Steel
  • Bezel material: Stainless Steel
  • Dial type: Reverse Panda Dial
Posted at
May 1, 2026, 7:54 PM
Active
[WTS] Omega Speedmaster Broadarrow. Strong Lume.

Omega Speedmaster Broadarrow. Strong Lume.

A vintage Omega Speedmaster Broadarrow with strong lume, available for sale.

  • Condition: Runs well
  • Lume: strong
  • Shipping: Fedex with insurance
Posted at
May 1, 2026, 6:07 PM
Active
[WTS] Omega Speedmaster Reduced "Michael Schumacher" Limited Edition, 3517.30.00. Card Included. Collector's watch. Clean..

Omega Speedmaster Reduced "Michael Schumacher" Limited Edition, 3517.30.00. Card Included. Collector's watch. Clean..

Omega - 3517.30.00 · $3,495
A collector's Omega Speedmaster Reduced 'Michael Schumacher' Limited Edition, in good condition with a card included.

  • Condition: Clean
  • Shipping method: Fedex with insurance
  • Location: NJ USA
Posted at
May 1, 2026, 6:01 PM
Active
[WTS] OMEGA Speedmaster Professional Sapphire Sandwich 3861 Latest Model on Forstner Bullet - Watch Only - $5400 shipped CONUS

OMEGA Speedmaster Professional Sapphire Sandwich 3861 Latest Model on Forstner Bullet - Watch Only - $5400 shipped CONUS

The Omega Speedmaster Professional Sapphire Sandwich 3861 is a latest model watch sold as watch only, with shipping included to CONUS.

Posted at
May 1, 2026, 5:38 PM
Active
[WTS] Omega Speedmaster. Sapphire Sandwich. Box, Cards.

Omega Speedmaster. Sapphire Sandwich. Box, Cards.

Omega - Speedmaster · $6,150
A Omega Speedmaster sapphire sandwich watch with box and cards is being sold.

  • Location: NJ USA
Posted at
May 1, 2026, 4:47 PM
Active
[WTS] Omega Speedmaster 40 3211.31

Omega Speedmaster 40 3211.31

Omega - 3211.31 · $2,175
A used Omega Speedmaster 40mm model 3211.31, featuring a minor scratch on the crystal.

  • Condition: Minor scratch on crystal
  • Bracelet length: 7 inches
Posted at
May 1, 2026, 3:33 PM
Active
[WTS] Omega Speedmaster Professional. Moonwatch. 3570.50. Very nice condition...

Omega Speedmaster Professional. Moonwatch. 3570.50. Very nice condition...

Omega - 3570.50 · $4,100
This Omega Speedmaster Professional Moonwatch is a high-end timepiece with a rich history and design.

  • Condition: Very nice condition
  • Location: NJ USA
  • Shipping: included
Posted at
May 1, 2026, 3:30 PM
Active