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 Reverse Panda Speedmaster Full Set $11,900 including CONUS shipping 310.30.42.50.01.004

Omega Reverse Panda Speedmaster Full Set $11,900 including CONUS shipping 310.30.42.50.01.004

Omega - Speedmaster 310.30.42.50.01.004 · $11,900
For sale is the new Speedmaster reverse panda, comes with full links and all accessories.

  • Condition: Unworn, essentially new condition
  • Case Size: 42mm diameter
  • Shipping Included: continental US
Posted at
Jan 16, 2026, 8:06 PM
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[WTS] Omega Speedmaster Professional Moonwatch Sapphire Sandwich – Full Set – Sept 2025 Warranty – Bracelet + Leather

Omega Speedmaster Professional Moonwatch Sapphire Sandwich – Full Set – Sept 2025 Warranty – Bracelet + Leather

Omega - Sapphire Sandwich · $6,700
This Omega Speedmaster Professional Moonwatch features a 42mm stainless steel case with sapphire crystal front and display caseback, powered by a manual-wind movement.

  • Condition: Very good condition
  • Case size: 42mm diameter
  • Crystal material: Sapphire front & display caseback
  • Movement type: Manual-wind Co-Axial Master Chronometer
Posted at
Jan 16, 2026, 6:31 PM
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[WTS] OMEGA Speedmaster Calibre 321 "Ed White" Ref. 311.30.40.30.01.001 - ULTIMATE SET! 🔥$18,000🔥

OMEGA Speedmaster Calibre 321 "Ed White" Ref. 311.30.40.30.01.001 - ULTIMATE SET! 🔥$18,000🔥

OMEGA - 311.30.40.30.01.001 · $18,000
The OMEGA Speedmaster Calibre 321 Ref. 311.30.40.30.01.001 is a faithful recreation of the reference 105.003, famously worn by astronaut Ed White during America's first spacewalk.

  • Condition: UNWORN
  • Movement: Calibre 321
  • Case material: stainless steel
  • Diameter: 39.7mm
Posted at
Jan 16, 2026, 6:20 PM
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[WTS] Omega. Speedmaster Moonwatch. "1971 Apollo XV". $5350 Only

Omega. Speedmaster Moonwatch. "1971 Apollo XV". $5350 Only

Omega - 311.30.42.30.01.003 · $5,350
This Omega Speedmaster Moonwatch, celebrating the Apollo 15 mission, features a black dial with blue and red accents and comes with an OEM bracelet.

  • Condition: Good condition (7.5/10)
  • Case size: 42mm
  • Bracelet length range: 7.5inch hand
  • Dial color: Black with Blue and Red Accents
Posted at
Jan 16, 2026, 1:21 PM
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[WTS] 2024 Omega Speedmaster "Ed White" 39.7mm 311.30.40.30.01.001 Black Dial - $16,250

2024 Omega Speedmaster "Ed White" 39.7mm 311.30.40.30.01.001 Black Dial - $16,250

Omega - 311.30.40.30.01.001 · $16,250
2024 Omega Speedmaster "Ed White" in 39.7mm case size with a black dial.

  • Case diameter: 39.7mm
Posted at
Jan 16, 2026, 10:23 AM
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[WTS] 2024 Omega Speedmaster "Ed White" 39.7mm 311.30.40.30.01.001 Black Dial - $16,250

2024 Omega Speedmaster "Ed White" 39.7mm 311.30.40.30.01.001 Black Dial - $16,250

Omega - 311.30.40.30.01.001 · $16,250
2024 Omega Speedmaster 'Ed White' in a 39.7mm case with a black dial.

  • Case size: 39.7mm diameter
  • Dial color: black
Posted at
Jan 16, 2026, 10:20 AM
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[WTS] Omega Speedmaster Calibre 321 Ed White 311.30.40.30.01.001 $13,999

Omega Speedmaster Calibre 321 Ed White 311.30.40.30.01.001 $13,999

Omega - 311.30.40.30.01.001 · $13,999
This Omega Speedmaster Calibre 321 pays tribute to the original speedmaster worn during America's first spacewalk in 1965, with a 39.7mm stainless steel case powered by the legendary hand-wound Calibre 321.

  • Condition: Preowned - Excellent
  • Box Papers: Yes, dated July 2023
  • Case Size: 39.7mm diameter
  • Movement Type: hand-wound
Posted at
Jan 16, 2026, 9:50 AM
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[WTS] 2007 Omega Speedmaster Date Chronograph 3210.50 - $2,999

2007 Omega Speedmaster Date Chronograph 3210.50 - $2,999

Omega - 3210.50 · $2,999
A 2007 Omega Speedmaster Date Chronograph, in good overall condition, with a stainless steel bracelet and black dial.

  • Condition: Good overall condition, light wear on case and bracelet
  • Serial number: 81.6M (circa 2007)
  • Movement: Automatic chronograph
  • Dial color: Black
Posted at
Jan 16, 2026, 2:09 AM
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[WTS] 📣🚨OMEGA Speedmaster “FOIS” 311.32.40.30.01.001 EXCELLENT CONDITION! **$4950 shipped** 🚨📣

📣🚨OMEGA Speedmaster “FOIS” 311.32.40.30.01.001 EXCELLENT CONDITION! **$4950 shipped** 🚨📣

OMEGA - 311.32.40.30.01.001 · $4,950
This is a preowned Omega Speedmaster 'First Omega in Space' in excellent condition, featuring a manual wind movement and complete set, including box and papers.

  • Condition: Excellent / like new
  • Movement: Caliber 1861
  • Case Size: 39.7mm diameter
  • Box Condition: shows wear
Posted at
Jan 15, 2026, 10:36 PM
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