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. Tokyo Edition. Rare Bird. Omega Serviced 2024. Clean.
This Omega Speedmaster Tokyo Edition is a rare and highly sought-after timepiece, featuring a clean condition and recent service from Omega in 2024.
- Condition: Clean
- Case size: 42mm diameter
![[WTS] Omega Speedmaster Moonwatch Professional 310.32.42.50.01.002 - Full Set – 2/3/24 - Barely Worn (US ONLY)](https://external-preview.redd.it/1WN8HTxAvuLsprhwyt5Qvxq2fiyJdVdHFjrj9qFzC2I.jpg?auto=webp&s=120dee063c8cb5d078c6c66e1455c0a06aff7263)
Omega Speedmaster Moonwatch Professional 310.32.42.50.01.002 - Full Set – 2/3/24 - Barely Worn (US ONLY)
A black dial Omega Speedmaster Moonwatch Professional, purchased new on 2/3/24, with a 42mm case and black leather strap.
- Condition: Barely worn
- Case size: 42mm
- Bezel condition: Almost microscopic mark at :59 on the dial
![[WTS] Omega Speedmaster. Moonwatch $2250.00](https://external-preview.redd.it/3vG8GwrU93BdmPCDgdPOTrVkZC2cp0c69XTWJuuNK3I.jpeg?auto=webp&s=d2539b444b3cbd771032afd93ffa9dea9920d470)
Omega Speedmaster. Moonwatch $2250.00
A Omega Speedmaster Moonwatch with its original box and manual is being sold.
- Box: yes, included
![[WTS] Omega Speedmaster. Tokyo Edition. Rare Bird. Omega Serviced 2024. Clean.](https://preview.redd.it/4xyo7bl9kp7f1.jpeg?auto=webp&s=a7a2408857b2e2d22c7047601c361bcb4da84988)
Omega Speedmaster. Tokyo Edition. Rare Bird. Omega Serviced 2024. Clean.
This Omega Speedmaster Tokyo Edition features a rare design and has been serviced by Omega in 2024. It comes with the original service box, links, and service papers.
- Case Dimensions: 42mm diameter
- Serviced By: Omega
- Service Year: 2024
Omega Speedmaster Reduced Mop Dial Automatic 3534.70.00
A 38mm Omega Speedmaster Reduced Mop Dial Automatic, a chronograph watch with a mechanical automatic movement and stainless steel case.
- Condition: 90%
- Size: 38mm diameter
- Case material: Stainless Steel
- Movement type: Mechanical Automatic

Pre-Owned Omega Speedmaster Pilot 332.10.41.51.01.002
A pre-owned Omega Speedmaster Pilot with a black dial, automatic movement, 41mm stainless steel case, and water resistance to 100 meters.
- Condition: Pre-owned, with faint marks on the sides and back of the case (96%), slight marks on the links and clasp (93%), minor wear on an OEM strap (97%)
- Case size: 41mm diameter
- Material: Stainless Steel
- Dial color: Black
![[WTS] Omega Speedmaster Professional - Hesalite - on strap or bracelet - full kit](https://external-preview.redd.it/5cypGF4RO97K6Q2r4jl2pS2Rmo4oZgHS82v3rs5jnXw.jpeg?auto=webp&s=b5ff24727624c963c54aba2d600ff561094868a7)
Omega Speedmaster Professional - Hesalite - on strap or bracelet - full kit
This Omega Speedmaster Professional is a Hesalite version, sold on the original factory fabric strap or an Omega factory bracelet. It comes in full kit with inner and outer boxes, chronometer card, pictogram card, Jomashop warranty card, hang tags, and case back sticker.
- Condition: Very good used condition
- Strap/bracelet options: original factory strap and Omega factory bracelet
- Case condition: a few hairlines visible on polished portions
Omega De Ville 36mm with Speedmaster Cal. 1861 Movement
This Omega De Ville Prestige chronograph features a 36.1mm stainless steel case, hand-wound Cal. 1861 chronograph movement, and dauphine-style hands on a black color dial.
- Condition: Excellent condition with minor wear marks on case and bracelet
- Case size: 36.1 mm
- Lug width: 19 mm
- Movement: Cal. 1861
![[WTS] Omega 36mm with Speedmaster Cal. 1861 Movement $1,999](https://preview.redd.it/2kfcxdhfoi7f1.jpeg?auto=webp&s=4a0577e1e629144acd5f719ab26f8265f1057348)
Omega 36mm with Speedmaster Cal. 1861 Movement $1,999
This Omega De Ville Prestige chronograph is a rare hidden gem from the 90's Omega catalog, featuring a 36.1 mm stainless steel case and hand-wound Cal. 1861 chronograph movement.
- Condition: excellent with minor wear marks on case and bracelet
- Case size: 36.1mm diameter
- Lug width: 19mm
- Movement: Cal. 1861