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 Chronograph Date 40mm 3212.80 | 2013 Complete Set

Omega Speedmaster Chronograph Date 40mm 3212.80 | 2013 Complete Set

Omega - 3212.80 · $2,999
2013 Omega Speedmaster Chronograph Date with a 40mm case, featuring a manual winding movement and date function.

  • Condition: Excellent Pre-Owned Condition
  • Year: 2013
  • Bracelet links: 15
Posted at
Jan 15, 2026, 7:11 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Chronograph 38 324.33.38.40.04.001 | 2013 Full Set

Omega Speedmaster Chronograph 38 324.33.38.40.04.001 | 2013 Full Set

Omega - 324.33.38.40.04.001 · $2,999
This is a 2013 Omega Speedmaster Chronograph 38 with crystal and bezel clean, slight wear on the case and clasp.

  • Condition: Pre-Owned with slight wear on case and clasp
  • Year Of Manufacture: 2013
  • Service History: Unknown
Posted at
Jan 15, 2026, 7:07 PM
Active
View listing on r/WatchExchange
[WTS]🔥Omega Speedmaster 42MM "Silver Snoopy Award"- Ref 310.32.42.50.02.001 (NEW / UNWORN : DEC 2025 COMPLETE SET)🔥

🔥Omega Speedmaster 42MM "Silver Snoopy Award"- Ref 310.32.42.50.02.001 (NEW / UNWORN : DEC 2025 COMPLETE SET)🔥

Omega - 310.32.42.50.02.001 · $15,299
This Omega Speedmaster features a beautiful white dial and comes in a 42mm stainless case size. It is part of the Silver Snoopy Award collection, specifically from December 2025.

  • Condition: Brand New/Unworn
  • Case Size: 42mm diameter
  • Year: 2025
Posted at
Jan 15, 2026, 6:13 PM
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[WTS] 2015 Omega Speedmaster Moonwatch 44.25mm 311.30.44.51.01.002 Black Dial - $5,000

2015 Omega Speedmaster Moonwatch 44.25mm 311.30.44.51.01.002 Black Dial - $5,000

Omega - 311.30.44.51.01.002 · $5,000
The watch being listed is a 2015 Omega Speedmaster Moonwatch with a 44.25mm black dial, featuring a stainless steel bracelet and leather strap.

  • Condition: Excellent overall condition
  • Bracelet condition: Stainless steel bracelet basically brand new, still has factory sticker on clasp
  • Included accessories: Original Omega Double boxed,Box and Papers - Yes,International Warranty card dated 2015,Pictograms Card with Leather Card holder,Operating Instructions booklet,Omega Hang Tag
  • Wrist size: 8.25inch
Posted at
Jan 15, 2026, 5:57 PM
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[WTS] Omega Speedmaster 3511.50 Reverse Panda JAPAN EDITION

Omega Speedmaster 3511.50 Reverse Panda JAPAN EDITION

Omega - 3511.50 · $2,150
For sale is an Omega Speedmaster 3511.50 Reverse Panda JAPAN EDITION in great condition, with a clean crystal and running properly.

  • Condition: great condition
  • Payment Methods Accepted: pretty much every payment method including crypto
  • Local Meeting Available: yes
  • Payment Method Not Accepted: PayPal
Posted at
Jan 15, 2026, 5:39 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Professional Moonwatch 3573.50

Omega Speedmaster Professional Moonwatch 3573.50

Omega - 3573.50 · $4,550
This Omega Speedmaster Professional Moonwatch is in excellent condition with hardly any signs of wear.

  • Condition: Excellent condition, hardly any signs of wear
  • Payment Methods Accepted: Pretty much every payment method including crypto with a small fee
  • No Paypal Accepted: true
  • Other Payments: cash, credit cards, etc.
Posted at
Jan 15, 2026, 5:32 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster “Ed White” Cal. 321 Tropical Dial Heavy Patina (Serviced)

Omega Speedmaster “Ed White” Cal. 321 Tropical Dial Heavy Patina (Serviced)

Omega - 105.003-65 · $10,995
This Omega Speedmaster 'Ed White' features a stunning brown tropical dial and is one of the most collectible variants among Speedmaster enthusiasts, having been worn by astronauts during NASA's Gemini missions. The movement has been professionally serviced in July 2025, ensuring accurate timekeeping with chronograph functions performing as intended.

  • Condition: Very good condition
  • Size: 39mm diameter
  • Year: 1965
  • Movement serviced: July 2023
Posted at
Jan 15, 2026, 5:27 PM
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[WTS] Omega Speedmaster Reduced - 39mm Two Tone - Ref 175.0033 - Price Reduced!

Omega Speedmaster Reduced - 39mm Two Tone - Ref 175.0033 - Price Reduced!

Omega - 175.0033 · $2,795
This Omega Speedmaster Reduced features a white dial and is available for sale as watch only on a high-quality leather strap.

  • Condition: great vintage condition, light hairlines on bezel and case
  • Case size: 39mm
  • Strap material: leather AM strap from Casanova
Posted at
Jan 15, 2026, 12:33 PM
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[WTS] 2021 Omega Speedmaster Professional Moonwatch Sapphire Sandwich $5,999

2021 Omega Speedmaster Professional Moonwatch Sapphire Sandwich $5,999

Omega - 310.30.42.50.01.002 · $5,999
The Omega Speedmaster Moonwatch Professional sapphire sandwich version features a robust and elegant 42mm stainless steel case, updated Caliber 3861 movement, and superior magnetic resistance.

  • Condition: Excellent time keeping with no significant gain or loss
  • Case size: 42mm diameter
  • Case thickness: 13.2mm
  • Lug width: 20mm
Posted at
Jan 15, 2026, 12:27 PM
Active
View listing on r/WatchExchange