Omega Speedmaster Speedmaster Professional Moonwatch Sapphire Sandwich / Strap
Reference 3873.50.31
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.
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] The madness that is the Omega Speedmaster Teutonic! Ghost Gray Ref 145.0040 JUST $2950 SHIPPED](https://preview.redd.it/1a6emw08qwpg1.jpg?width=640&crop=smart&auto=webp&s=95379150c7b32deafaf0786790de98d18a6b088c)
The madness that is the Omega Speedmaster Teutonic! Ghost Gray Ref 145.0040 JUST $2950 SHIPPED
This is a unique Omega Speedmaster Teutonic ref 145.0040 in Ghost Gray, featuring a bead-blasted case and integrated bracelet. It has a manual wound Omega cal 861 movement and original tritium lume.
- Condition: Pre-owned with wear, scratches and nicks
- Case size: 42mm
- Diameter: 40mm diameter (bezel)
- Movement: Manual wound Omega cal 861 winding and setting smooth, chronograph functions perfectly
![[WTS] Omega Speedmaster Professional 42MM White - 310.32.42.50.04.002 (NEW 2026 COMPLETE SET)](https://preview.redd.it/vkibnjnh4vpg1.jpg?width=640&crop=smart&auto=webp&s=683d5095328f41ae9a5518169896489a3b4340ad)
Omega Speedmaster Professional 42MM White - 310.32.42.50.04.002 (NEW 2026 COMPLETE SET)
A 42MM Omega Speedmaster Professional White, new in 2026, complete with packaging and accessories.
- Condition: new with handling marks
- Case size: 42mm diameter
- Warranty card date: 02/25/2026
![[WTS] Uncle Bracelet for Omega Speedmaster Professional 1861 - Mint Condition - Fully Linked - only $60 shipped CONUS](https://preview.redd.it/8h75we1ctupg1.jpg?width=640&crop=smart&auto=webp&s=fe0697b4191093648515733cd1fd87226247299c)
![[WTS] Omega Speedmaster Date 3513.82 Blue Dial Automatic Chronograph Price : 2200$](https://preview.redd.it/orw3d3a6rtpg1.jpg?width=640&crop=smart&auto=webp&s=fc92296ce8f7f138fbbf066ab4d97212ede0976b)
Omega Speedmaster Date 3513.82 Blue Dial Automatic Chronograph Price : 2200$
The Omega Speedmaster Date Blue Dial Ref: 3513.82 is a highly sought-after automatic chronograph with a sporty design and strong Speedmaster DNA, featuring a stunning blue dial, three chronograph sub-dials, large Arabic numerals, date window at 3 o'clock, and tachymeter bezel.
- Condition: Good condition (has been serviced)
- Size: 39mm diameter
- Dial color: Blue color
- Movement: Caliber 1152
![[WTS] Omega Speedmaster Racing 326.30.40.50.03.001](https://preview.redd.it/q6lxv28aptpg1.jpg?width=640&crop=smart&auto=webp&s=3d7aa3477a934fc4e88c5881462ea9cbb35c0cc5)
Omega Speedmaster Racing 326.30.40.50.03.001
For sale is an Omega Speedmaster Racing reference number 326.30.40.50.03.001, running great and available to be inspected.
- Condition: Great condition with light wear around the watch
![[WTS] Omega Speedmaster Date 38.5mm 3513.54](https://preview.redd.it/nw8zke08otpg1.jpg?width=640&crop=smart&auto=webp&s=ac1ce128c33de729fb8e351ff62ee47bf31fc7e1)
Omega Speedmaster Date 38.5mm 3513.54
For sale is an Omega Speedmaster Date 38.5mm reference number 3513.54, it's from 1998 and running great.
- Condition: good condition with moderate wear
- Year: 1998
- Size: 38.5mm
- Payment Methods Accepted: credit card, crypto, etc.
![[WTS] Omega Speedmaster First Omega In Space (FOIS)](https://preview.redd.it/ga1o9rovktpg1.jpg?width=640&crop=smart&auto=webp&s=af9947af3e2ddb17d82558f197affbb771ce208c)
Omega Speedmaster First Omega In Space (FOIS)
This Omega Speedmaster 'First Omega in Space' features a 39.7mm case size and comes with six straps, including the original Omega strap and three additional Horus camo straps.
- Case size: 39.7mm
- Straps included: 6
![[WTS] 2024 Omega Speedmaster Moonwatch Professional White Dial 310.30.42.50.04.001 – Full Set](https://preview.redd.it/n2uorlw8cqpg1.jpg?width=640&crop=smart&auto=webp&s=b5c7d789fa1c4bb5b931b4b5f1623e47f3cf6084)
2024 Omega Speedmaster Moonwatch Professional White Dial 310.30.42.50.04.001 – Full Set
2024 Omega Speedmaster Moonwatch Professional White Dial for sale, full set
![[WTS] Omega Speedmaster Reduced Tritium Patina (Read Comment)](https://preview.redd.it/u708rb8jvppg1.jpg?width=640&crop=smart&auto=webp&s=383edecab3a862a9278da314222414c7f7b0c637)
Omega Speedmaster Reduced Tritium Patina (Read Comment)
This Omega Speedmaster Reduced has a beautiful patina and is in great condition overall, but it needs a new pusher to be restored to its original state.