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] Omega Speedmaster. Moonwatch. 3570.50. Strong Lume.](https://preview.redd.it/ihv0zylmubxf1.jpeg?auto=webp&s=811e6bb2aa5c79c6bc05e2035f360a813519fe8e)
Omega Speedmaster. Moonwatch. 3570.50. Strong Lume.
This is an Omega Speedmaster Moonwatch, a model known for its strong lume and moon phase display.
- Lume strength: strong
- Shipping: Fedex with insurance
- Location: NJ USA
![[WTS] Omega Speedmaster 3590.50](https://preview.redd.it/srw2wa1vfbxf1.jpg?width=640&crop=smart&auto=webp&s=164344a75333fedb27704734538fff09287a1646)
Omega Speedmaster 3590.50
- Gender: men's
- Water Resistance: 30m
![[WTS] Omega Speedmaster Reduced 3510.50 (EUROPE 🇪🇺)](https://preview.redd.it/bl8yfgs5waxf1.png?width=640&crop=smart&auto=webp&s=dec7932190098908c6ee4a9c6b9c951752b28564)
![[WTS] Omega Speedmaster $4,511 BRAND NEW](https://preview.redd.it/e8erriee4axf1.jpg?width=640&crop=smart&auto=webp&s=de60edbe8bd23609db8e4790a7635a7555ce6468)
Omega Speedmaster $4,511 BRAND NEW
This is a brand new Omega Speedmaster watch. It's a classic design that exudes style and sophistication.
- Condition: Brand New
![[WTS] Omega Speedmaster Professional Hesalite - Weeks Old! 310.30.42.50.01.001](https://preview.redd.it/mwb21nihw9xf1.jpg?width=640&crop=smart&auto=webp&s=44747b3fbbb28fce8f3f2e43f30f8ef2f31a2afe)
Omega Speedmaster Professional Hesalite - Weeks Old! 310.30.42.50.01.001
This Omega Speedmaster Professional has been purchased brand new within the past month and comes with full set, boxes, papers, and warranty.
- Condition: Like new, consistent with about a week of total wear
- Warranty: 10/25 warranty
![[WTS] Omega Speedmaster Dark Side of the Moon Vintage Black Full Set 311.92.44.51.01.006 - $8,195](https://preview.redd.it/0xppa3ztt9xf1.jpg?width=640&crop=smart&auto=webp&s=d965ea62f3c3a7894196d4597a51b2a764148f8e)
Omega Speedmaster Dark Side of the Moon Vintage Black Full Set 311.92.44.51.01.006 - $8,195
This Omega Speedmaster Moonwatch, part of the Dark Side of the Moon collection, features a Vintage Black design.
- Condition: Excellent condition with minimal signs of wear
- Year: 2022
- Contents: Watch,Inner & Outer Box,International Warranty Card,Pictograms Card,Card Holder,Operating Instructions Manual,Omega Travel Box
- Condition Details: Strap is relatively new (purchased 4/27/25), Inner box has some wear
![[WTS] 2024 Omega Speedmaster Professional Moonphase 44.25mm 304.33.44.52.03.001 Blue Dial](https://preview.redd.it/f8cows4kd6xf1.jpg?width=640&crop=smart&auto=webp&s=365a384035e3a691a396f723f810493fe05d1f7d)
2024 Omega Speedmaster Professional Moonphase 44.25mm 304.33.44.52.03.001 Blue Dial
2024 Omega Speedmaster Professional Moonphase in 44.25mm size with blue dial.
- Condition: Pre-Owned, with wear on polished parts of case and worn but still usable strap
- Case size: 44.25mm diameter
![[WTS] [CANADA] Omega Speedmaster Reduced - MOP Dial - 39mm](https://preview.redd.it/z2m90r4g73xf1.jpg?width=640&crop=smart&auto=webp&s=67c93549efdb6be3eafea685a7b99588954d10e5)
[CANADA] Omega Speedmaster Reduced - MOP Dial - 39mm
A unique Omega Speedmaster Reduced featuring a mother of pearl dial with vibrant red Arabic numerals, available in a 39mm case size.
- Condition: Very well preserved with expected wear for the age
- Case Size: 39mm diameter
- Movement: Omega automatic chronograph
- Dial Material: Mother of pearl
![[WTS] Omega Speedmaster ‘57 Blue Dial Full Set 331.10.42.51.03.001](https://preview.redd.it/cquzbuu1xywf1.jpg?width=640&crop=smart&auto=webp&s=300ca9fded9a390b3c36a378c8f887fc86f46e29)
Omega Speedmaster ‘57 Blue Dial Full Set 331.10.42.51.03.001
This Omega Speedmaster '57 Blue Dial features a blue dial and red chrono hands, dated 2015, and is in good condition with some scratches. It comes as a full set with original box, warranty cards, and extra links.
- Condition: Good condition with scratches, serviced in 2017
- Case diameter: 41.5mm
- Lug width: 20mm