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
Omega Speedmaster Chronoscope Co-Axial 43mm 329.30.43.51.02.001
A unique version of the Speedmaster, featuring a modern twist on classic Omega designs with distinctive timing scales and a beautiful dial.
- Condition: Excellent
- Case size: 43mm diameter
- Water resistance: 30m
![[WTS] Omega Speedmaster 'Ed White' Caliber 321 - 1965](https://preview.redd.it/17kdcjjy2i7f1.jpeg?auto=webp&s=01c4e6bc387d85987d83862c49fb03f9577c1432)
Omega Speedmaster 'Ed White' Caliber 321 - 1965
A 1965 Omega Speedmaster 'Ed White' Caliber 321, one of the most celebrated chronographs in watch history. It features a straight lug construction, stepped dial design, and reliable hand-wound Caliber 321 movement. This watch is highly prized among collectors for its historical significance and clean, functional aesthetic.
- Condition: Restored with new dial, hands, crystal, bracelet, and movement overhaul
- Movement: Caliber 321
- Diameter: 40mm
 Omega Speedmaster Reduced - Reverse Panda 3511.50](https://external-preview.redd.it/5hpMQRXx6FYVyLK0catmLf6Zh9y1ZumAzDf2IQ3jEmA.jpeg?auto=webp&s=294cf138ae542735f761e2205c33ea670a90d27b)
(EU ONLY) Omega Speedmaster Reduced - Reverse Panda 3511.50
This Omega Speedmaster Reduced features a Reverse Panda dial, housed in a steel case with a diameter of 39mm. The watch is powered by Omega's Caliber 1155/Valjoux 7750 movement, manufactured in the 1990s.
- Condition: Pre-owned with surface scratches
- Movement: Omega Caliber 1155/Valjoux 7750
- Manufacture date: 1990s
- Thickness: 13.5mm
![[WTS] Omega Speedmaster Racing Chronograph “Schumacher” Ref. 3810.61 – $2,399](https://external-preview.redd.it/QkjZrzmhLKjt6h9mgSe31ZsvNt4VYvvSmXO32fQDZRk.jpeg?auto=webp&s=b865590ab939df723db9d73aaabb4630094b2f55)
Omega Speedmaster Racing Chronograph “Schumacher” Ref. 3810.61 – $2,399
Up for grabs is my Omega Speedmaster Schumacher Racing (ref. 3810.61.41), a vibrant and rare edition featuring a red dial with yellow accents and automatic chronograph movement. Housed in a 39mm case, it wears well on most wrists and blends sporty appeal with vintage Omega design cues. Perfect for collectors or daily wearers looking for something bold yet refined.
- Condition: Excellent pre-owned condition
- Case Size: 39mm
- Dial Condition: pristine
- Crystal Condition: pristine
![[WTS] 2025 Omega Speedmaster 🌗 Price Drop!](https://external-preview.redd.it/kdm_Z1SVFTEEkrzPvNs4Z5SP25GgHOUjQaSKDKllLII.jpeg?auto=webp&s=23e9a6b9d3f0361d589406ffb656388e67032fc4)
2025 Omega Speedmaster 🌗 Price Drop!
This white dial Omega Speedmaster is in perfect condition, as shown in the pictures.
- Condition: Immaculate
- Outer Box: Yes
- Inner Box: Yes
- Operating Booklet: Yes
Omega Speedmaster - Dark Side of the Moon - 311.92.44.51.01.007 ( new / 2025 )
Up for sale is a brand new Omega Speedmaster Moonwatch Dark Side of the Moon / DSOM with Titanium Deployment Clasp, reference # 311.92.44.51.01.007 It comes complete with all boxes, papers, booklets, hang tag and Omega Warranty Card dated April 2025.
- Condition: Brand New
- Case material: Ceramic
- Case size: 44.25mm
- Movement type: Omega Co-Axial Calibre 9300
Omega Speedmaster Moonwatch Professional Co-Axial Master Chronometer Chronograph 42mm 310.30.42.50.04.001
This Omega Speedmaster Moonwatch Professional is a modern version of the classic chronograph, featuring a 42mm steel case and a sapphire crystal.
- Condition: Like New/Unworn
- Case material: Steel
- Bracelet material: Steel
- Crystal material: Sapphire
![[WTS] Omega Speedmaster X-33 *Full Service 6/25*](https://external-preview.redd.it/gL47Twey7_Z8nbIvzhhYnObVKaCPG9y9SA7pl8aG25I.jpeg?auto=webp&s=764dbed31f9423c6e2091f654be06d642ec7c52b)
Omega Speedmaster X-33 *Full Service 6/25*
This Omega Speedmaster X-33 is a recent service with a complete overhaul, making it ready to wear and backed by a 2-year warranty from Omega.
- Condition: pristine condition
- Service Date: 6/25
- Warranty Expires: 6/4/2025
Omega Speedmaster Tuetonic - Black dial (in UK)
This Omega Speedmaster Teutonic features a black dial, manual wind movement, and an integrated bracelet. The watch has a case width of 45mm and a thickness of 12.5mm.
- Condition: Good condition for age, with some scratches and minor wear
- Case Width: 45mm
- Bezel Diameter: 39mm
- Lug To Lug Width: 46mm