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 Pink Numerals Mother of Pearl Dial Automatic Chronograph – Ref. 3834.74.34 – Full Set – 2012 - Mint

Omega Speedmaster Pink Numerals Mother of Pearl Dial Automatic Chronograph – Ref. 3834.74.34 – Full Set – 2012 - Mint

Omega - 3834.74.34 · $3,490
A timeless classic from Omega's Speedmaster collection, featuring a refined and versatile take on the iconic design with a 38mm case size.

  • Condition: Very good
  • Case Size: 38mm diameter
  • Movement Type: Automatic chronograph
  • Crystal Material: Sapphire
Posted at
May 17, 2026, 2:29 PM
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[WTS] Omega Speedmaster Professional Moonwatch Black Dial 42mm 2026 Box & Papers - Like New

Omega Speedmaster Professional Moonwatch Black Dial 42mm 2026 Box & Papers - Like New

Omega - Speedmaster Professional Moonwatch · $7,150
  • Condition: Excellent
  • Size: 42mm diameter
  • Water Resistance: 50m depth rating
  • Movement: Omega manual wind chronograph movement
Posted at
May 17, 2026, 2:26 PM
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[WTS] Omega Speedmaster Olympic Collection Chronograph “Olympic Timeless Collection” Ref. 3836.70.36 | Rare Mother-of-Pearl Dial with Olympic Ring Numerals | 2012 Mint Condition Full Set

Omega Speedmaster Olympic Collection Chronograph “Olympic Timeless Collection” Ref. 3836.70.36 | Rare Mother-of-Pearl Dial with Olympic Ring Numerals | 2012 Mint Condition Full Set

Omega - 3836.70.36 · $3,750
A collectible Omega Speedmaster Olympic Collection Chronograph with a rare mother-of-pearl dial featuring colorful Arabic numerals inspired by the Olympic rings, blending the playful spirit of the Olympics with the timeless DNA of the Speedmaster line.

  • Condition: Mint Condition
  • Case size: 35.5mm
  • Movement: Omega Caliber 3220 automatic chronograph with 40-hour power reserve
  • Dial type: Mother-of-pearl with Olympic ring numerals
Posted at
May 17, 2026, 2:04 PM
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[WTS] Omega Speedmaster Professional 18k Sedna Gold

Omega Speedmaster Professional 18k Sedna Gold

Omega - Speedmaster Professional
a luxury sports watch designed for astronauts, part of the iconic Speedmaster collection

  • Material: 18k Sedna Gold
Posted at
May 17, 2026, 9:54 AM
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[WTS] Omega OEM 20mm Blue/Red Fabric Strap & 18mm Steel Deployant Clasp for Speedmaster/Snoopy - Like New

Omega OEM 20mm Blue/Red Fabric Strap & 18mm Steel Deployant Clasp for Speedmaster/Snoopy - Like New

Omega - 032CWZ005345 & 094521883 · $580
This is a blue reinforced fabric strap with white contrast stitching, paired with an authentic Omega stainless steel deployant clasp. It's designed for Speedmasters, especially the Snoopy model.

  • Condition: Like new
  • Lug width: 20mm
  • Taper size: 18mm
  • Material: stainless steel
Posted at
May 17, 2026, 9:51 AM
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[WTS] OEM Omega Speedmaster White NASA Velcro Strap - Like New

OEM Omega Speedmaster White NASA Velcro Strap - Like New

Omega - Speedmaster White NASA Strap · $200
This is an official Omega Boutique accessory designed to honor the Moonwatch's space exploration heritage, featuring a blue NASA logo and polished steel loop.

  • Condition: Like New
  • Lug Width: 20mm
  • Fits: standard 42mm Speedmaster Professional models
Posted at
May 17, 2026, 9:44 AM
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[WTS] Omega Speedmaster Sapphire - 310.30.42.50.01.002, Full Set, Excellent condition!

Omega Speedmaster Sapphire - 310.30.42.50.01.002, Full Set, Excellent condition!

Omega - 310.30.42.50.01.002 · $6,540
A classic Omega Speedmaster with a sapphire sandwich design, in excellent condition and fully set.

  • Condition: Excellent, 98%
  • Movement Status: Running great, no issues
  • Chrono Status: Flawless
Posted at
May 17, 2026, 8:25 AM
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[WTS] Omega Speedmaster 50th Anniversary – No. 927/1957 – Numbered Edition – Black Enamel Dial

Omega Speedmaster 50th Anniversary – No. 927/1957 – Numbered Edition – Black Enamel Dial

Omega - 50th Anniversary Limited Edition · $10,200
A numbered Omega Speedmaster 50th Anniversary Limited Edition with a black enamel dial, capturing the vintage spirit of the original Speedmaster while incorporating modern precision and finishing.

  • Condition: Very good overall condition with light handling marks and minor signs of wear
  • Case size: 42mm
  • Dial material: Black enamel
  • Movement type: Omega manual-wind chronograph
Posted at
May 16, 2026, 8:59 PM
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[WTS] Omega Speedmaster Reduced “Red Schumacher” 3510.61 – OG Bracelet – $2995 + shipping OBO

Omega Speedmaster Reduced “Red Schumacher” 3510.61 – OG Bracelet – $2995 + shipping OBO

Omega - 3510.61 · $2,995
This Omega Speedmaster Reduced features a bright red dial, Schumacher connection and late 90s / early 2000s Omega styling giving it a lot of personality. It's one of the more collectible and fun variants in the Speedmaster Reduced line.

  • Condition: Very nice condition for its age with normal light wear consistent with use
  • Bracelet size: ~6.75 inch diameter
  • Additional links: 2
  • Movement: Automatic chronograph movement
Posted at
May 16, 2026, 6:03 PM
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