Omega Speedmaster Speedmaster Professional Moonwatch Sapphire Sandwich / Strap

Reference 3873.50.31

Omega Speedmaster Professional Moonwatch Sapphire Sandwich / Strap

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 Dark Side Of The Moon DSOTM Black Ceramic "Dark Vader" 310.92.44.51.01.001

Omega Speedmaster Dark Side Of The Moon DSOTM Black Ceramic "Dark Vader" 310.92.44.51.01.001

Omega - 310.92.44.51.01.001 · $13,250
This Omega Speedmaster Dark Side of the Moon 'Dark Vader' features a slim manual wind case and matte finished grained dial with red lacquered chrono seconds hand.

  • Condition: Excellent, Mint condition
  • Case size: 44mm
  • Warranty: until 04/2026
Posted at
May 11, 2026, 8:44 PM
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[WTS] 1969 Omega Speedmaster Mark II Chronograph 145.014 Racing Dial

1969 Omega Speedmaster Mark II Chronograph 145.014 Racing Dial

Omega - 145.014 · $9,000
a 1969 Omega Speedmaster Mark II Chronograph with a racing dial

  • Year: 1969
Posted at
May 11, 2026, 4:51 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster 3310.10 Vintage 18K Yellow Gold with Steel ($2200)

Omega Speedmaster 3310.10 Vintage 18K Yellow Gold with Steel ($2200)

Omega - 3310.10 · $2,200
This Omega Speedmaster features a 39mm case, an upgraded dial with white and gold accents, and is running within +10 seconds per day. It has been authenticated by eBay and comes with an authentication card.

  • Condition: Pre-owned with wear
  • Case size: 39mm diameter
  • Serial number date: 1989
Posted at
May 11, 2026, 11:58 AM
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[WTS] Omega Speedmaster Apollo 17 45th Anniversary 311.30.42.30.03.001 $6,900

Omega Speedmaster Apollo 17 45th Anniversary 311.30.42.30.03.001 $6,900

Omega - 311.30.42.30.03.001 · $6,900
This Omega Speedmaster Apollo 17 is a commemorative edition of the iconic watch, featuring a unique design and excellent condition.

  • Condition: Excellent, freshly polished
  • Length: 18.5cm bracelet length
  • Shipping: 4-5 business days to US
Posted at
May 11, 2026, 8:55 AM
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[WTS][US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

[US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

Omega - 310.30.42.50.01.004 · $10,700
A brand new Omega Speedmaster Moonwatch Professional in reverse panda style with a 42mm case size.

  • Condition: Brand new, unworn, and pristine
  • Case Size: 42mm
  • Box And Papers: true
Posted at
May 11, 2026, 7:48 AM
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[WTS] Omega Speedmaster Reduced 3510.21 Limited Edition (2,000 Pcs) Marui 39mm , B&P - $5,350

Omega Speedmaster Reduced 3510.21 Limited Edition (2,000 Pcs) Marui 39mm , B&P - $5,350

Omega - 3510.21 Marui · $5,350
Up for sale is my Omega Speedmaster 3510.21, a limited edition watch with an automatic movement and 39mm case.

  • Condition: Very good condition (8.9/10)
  • Movement type: Automatic
  • Case size: 39mm
  • Bracelet type: Original Omega Steel
Posted at
May 10, 2026, 9:10 PM
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[WTS] Omega Speedmaster Moonwatch Professional 3861 Sapphire 310.32.42.50.01.002 – Full Set – $6,500

Omega Speedmaster Moonwatch Professional 3861 Sapphire 310.32.42.50.01.002 – Full Set – $6,500

Omega - 3861 Sapphire 310.32.42.50.01.002 · $6,500
This Omega Speedmaster Moonwatch Professional Sapphire Sandwich features a 42mm stainless steel case and the 3861 Omega Master Chronometer movement.

  • Case Size: 42mm diameter
  • Material: stainless steel
  • Movement: Omega Master Chronometer
Posted at
May 10, 2026, 6:36 PM
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[WTS] Omega Speedmaster Moonphase 304.33.44.52.01.001

Omega Speedmaster Moonphase 304.33.44.52.01.001

Omega - 304.33.44.52.01.001 · $7,750
This Omega Speedmaster features a moonphase complication, automatic co-axial movement 9904, and comes with box, papers, and tag.

  • Condition: Good pre-owned condition
  • Size: 44.25mm diameter
  • Movement: Automatic
  • Strap: Omega leather strap
Posted at
May 10, 2026, 4:51 PM
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[WTS] PRICE DROP! Vintage Omega Speedmaster Teutonic Gray Dial Ref 145.0044 Rare German Market Outside-The-Box Speedy

PRICE DROP! Vintage Omega Speedmaster Teutonic Gray Dial Ref 145.0044 Rare German Market Outside-The-Box Speedy

Omega - 145.0044 · $2,750
A rare Omega Speedmaster Teutonic Gray Dial Ref 145.0044 made for the German market in the early 1980s. It has a bead-blasted case, integrated bracelet, and original tritium lume.

  • Condition: Pre-owned with wear, scratches, and nicks
  • Diameter: 42mm
  • Movement: Manual wound Omega cal 861
  • Bracelet size: up to app 7.25 inches
Posted at
May 10, 2026, 4:49 PM
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