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] 2021 SERVICED Omega Speedmaster Apollo 8 Dark Side of the Moon 311.92.44.30.01.001 B&P

2021 SERVICED Omega Speedmaster Apollo 8 Dark Side of the Moon 311.92.44.30.01.001 B&P

Omega - 311.92.44.30.01.001 · $8,500
The Omega Speedmaster Dark Side of the Moon Apollo 8 is one of the most striking modern Speedmasters — full black ceramic, skeleton dial, and a movement laser-engraved to look like the lunar surface. The yellow accents give it that bold, mission-ready look you can spot across the room.

  • Condition: Good condition with very few signs of wear, mainly on the leather strap
  • Case Size: 44.25mm
  • Movement Caliber: Omega Calibre 1861
  • Power Reserve: 48 hours
Posted at
May 8, 2026, 3:05 PM
Active
View listing on r/WatchExchange
[WTS] 2022 Omega Speedmaster Racing 40mm 326.32.40.50.06.001 Full Set Excellent

2022 Omega Speedmaster Racing 40mm 326.32.40.50.06.001 Full Set Excellent

Omega - 326.32.40.50.06.001 · $4,500
A sporty, modern Speedmaster with racing‑inspired detailing.

  • Condition: Excellent
  • Size: 40mm diameter
  • Year: 2022
Posted at
May 8, 2026, 2:04 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Reduced 39mm - 3510.50

Omega Speedmaster Reduced 39mm - 3510.50

Omega - 3510.50 · $2,495
A Omega Speedmaster Reduced in 39mm size, running strong with a small issue with the chronograph function.

  • Condition: pre-owned, good condition
  • Size: 39mm diameter
  • Wrist size: not specified
Posted at
May 8, 2026, 1:02 PM
Active
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[WTS] Omega Speedmaster Day Date 3523.80

Omega Speedmaster Day Date 3523.80

Omega - 3523.80 · $2,225
This Omega Speedmaster Day Date features a beautiful blue dial and is in excellent condition.

  • Condition: Excellent
  • Payment Methods Accepted: Cryptocurrency and other methods (except PayPal)
  • Location: Southwest FL
  • Local Meeting Available: Yes
Posted at
May 8, 2026, 12:50 PM
Active
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[WTS] Omega Speedmaster Date 3511.50

Omega Speedmaster Date 3511.50

Omega - 3511.50 · $1,975
This Omega Speedmaster date is a rare reverse panda dial model only sold in Japan.

  • Condition: great condition
  • Location: southwest FL
  • Payment Methods Accepted: crypto with small fee, local meetups
  • Payment Methods Not Accepted: PayPal
Posted at
May 8, 2026, 12:19 PM
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[WTS] “May the 4th Be With You” 2026 Card Omega Speedmaster Sapphire Complete Set *$7,200 + label*

“May the 4th Be With You” 2026 Card Omega Speedmaster Sapphire Complete Set *$7,200 + label*

Omega - 310.30.42.50.01.002 · $7,200
A brand new Omega Speedmaster Sapphire Sandwich Complete Set with all cards included, travel case, and literature.

  • Condition: Brand new, unworn and unsized
  • Year: 5/4/2026
  • Contents: All cards included, travel case and Speedmaster literature
  • Payment methods: Zelle or Wire preferred, Credit Cards accepted +3.5%
Posted at
May 8, 2026, 11:23 AM
Active
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[WTS] 2026 Omega Speedmaster White Full Set

2026 Omega Speedmaster White Full Set

Omega - Speedmaster
No description provided in the listing

Posted at
May 8, 2026, 10:13 AM
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[WTS][US] Omega Speedmaster Calibre 321 - Ed White - Black Dial - 39.7mm - 311.30.40.30.01.001 - Full Set

[US] Omega Speedmaster Calibre 321 - Ed White - Black Dial - 39.7mm - 311.30.40.30.01.001 - Full Set

Omega - 311.30.40.30.01.001 · $15,550
Up for sale is an Omega Speedmaster Calibre 321 - Ed White - Black Dial - 39.7mm, functions perfectly mechanically.

  • Condition: pristine condition with minor hairlines on clasp, case, and bracelet
  • Diameter: 39.7mm
Posted at
May 8, 2026, 8:05 AM
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[WTS] Omega Speedmaster Hesilate Ref. 310.32.42.50.01.001 Full Set + Original Receipt

Omega Speedmaster Hesilate Ref. 310.32.42.50.01.001 Full Set + Original Receipt

Omega - 310.32.42.50.01.001 · $4,999
This Omega Speedmaster Moonwatch Professional features a Co-Axial Master Chronometer Caliber 3861 and is in excellent overall condition, with the notable exception of a very minor mark on the Hesalite crystal.

  • Condition: Excellent overall condition with minor mark on Hesalite crystal and light signs of normal wear on case
  • Movement: Co-Axial Master Chronometer Caliber 3861
  • Crystal type: Hesalite
  • Caseback type: Aftermarket exhibition caseback (original solid also included)
Posted at
May 8, 2026, 8:00 AM
Active
View listing on r/WatchExchange