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 Date 3210.50 Black Dial $1,999](https://preview.redd.it/nddue5o6eczg1.jpeg?auto=webp&s=b06a7f229856e27c9ec6ceb92b6163da0238636d)
Omega Speedmaster Date 3210.50 Black Dial $1,999
The Omega Speedmaster Date is a 40mm stainless steel automatic chronograph with a black dial and tachymeter bezel, featuring a sporty classic look.
- Condition: good pre-owned
- Case size: 40mm diameter
- Lug-to-lug: 45mm length
- Lug width: 19mm width
![[WTS] Omega Speedmaster Silver Snoopy 50th Anniversary 310.32.42.50.02.001 ( new / 2025 / box and papers )](https://preview.redd.it/26w27e8vaczg1.jpg?width=640&crop=smart&auto=webp&s=ac3238df4e049426fb5d8b04d0bc244222aa0b4e)
Omega Speedmaster Silver Snoopy 50th Anniversary 310.32.42.50.02.001 ( new / 2025 / box and papers )
This Omega Speedmaster Moonwatch is a brand new Silver Snoopy Award 50th Anniversary model, featuring a 42mm stainless steel case and the Omega Master Chronometer Movement.
- Condition: Brand new
- Case size: 42mm
- Movement type: Master Chronometer
![[WTS] Omega Speedmaster Dark Side of the Moon 44.25mm 310.92.44.51.01.002 ( new / 2025 / box and papers )](https://preview.redd.it/7knhhf02aczg1.jpg?width=640&crop=smart&auto=webp&s=4f8c8e0954c6be6277b3dc9eee5008ec0c6dfe7f)
Omega Speedmaster Dark Side of the Moon 44.25mm 310.92.44.51.01.002 ( new / 2025 / box and papers )
The Omega Speedmaster Dark Side of the Moon is a high-end watch with a black ceramic case and Co-Axial Calibre 9900 movement.
- Condition: Brand new
- Case material: Black ceramic
- Diameter: 44.25mm
![[WTS] Omega Speedmaster Apollo 17](https://preview.redd.it/o8ffnsds9czg1.jpg?width=640&crop=smart&auto=webp&s=dc9e0644c3639e9261d5c191de8faba029915865)
Omega Speedmaster Apollo 17
This rare Omega Speedmaster Apollo 17 is one of only 1972 pieces ever made, featuring a good condition and no major marks on the bracelet or watch.
- Condition: Good
- Production run size: 1972 pieces
- Bracelet condition: No major marks
- Wrist size requirement: 7.3 inches
![[WTS] Omega Speedmaster Snoopy New 5/2026, $15.5k](https://preview.redd.it/lpadrfctkbzg1.jpg?width=640&crop=smart&auto=webp&s=6eebfaa337b8aab4cf8bab3413aa01b73753866c)
Omega Speedmaster Snoopy New 5/2026, $15.5k
This is a listing for an Omega Speedmaster Snoopy, a new watch with a reference number of 310.32.42.50.02.001. The watch comes in its original box and has a dated warranty.
- Condition: New
- Shipping Cost: $100 Shipping for USA
- Payment Methods: Wire or Credit Card (+4.9% & 4 days clearance)
- Warranty Duration: 2 years (2026-2028)
![[WTS] [US] Omega Speedmaster Moonwatch Professional Moonshine Gold Black Dial 42mm 310.60.42.50.01.002 - Complete Set 2026 - $35,000](https://preview.redd.it/s3gow9lqhbzg1.jpg?width=640&crop=smart&auto=webp&s=684ca3cd3694bf7898811dc4df5b6253d6bf5c61)
![[WTS][US] Omega Speedmaster First Omega in Space - FOiS - 310.30.40.50.06.001 - Full Set](https://preview.redd.it/ew8yclahxazg1.jpg?width=640&crop=smart&auto=webp&s=3eb8a0c0e91c72808351c3dccf3bfec4eed76352)
[US] Omega Speedmaster First Omega in Space - FOiS - 310.30.40.50.06.001 - Full Set
This Omega Speedmaster First Omega in Space is a mechanical watch that comes fully linked with its original accessories.
- Condition: Fantastic condition with few, if any hairlines on case, clasp, and bracelet.
- Case condition: Few hairlines
- Comes with: Full set of accessories
![[WTS] Omega Speedmaster Reduced 3510.50](https://preview.redd.it/wpw82mrf18zg1.jpg?width=640&crop=smart&auto=webp&s=34c44df1145cd278efa6a0cd6ab81c4584eb4a2a)
Omega Speedmaster Reduced 3510.50
This Omega Speedmaster Reduced is a 39mm watch with a 7-inch bracelet.
- Case size: 39mm
![[WTS] Omega Speedmaster Reduced 3510.50 - $2500 SHIPPED](https://preview.redd.it/tu5i4r9ec7zg1.jpeg?auto=webp&s=704f510411631af4fb81d73d77d4f698e81ec752)
Omega Speedmaster Reduced 3510.50 - $2500 SHIPPED
This Omega Speedmaster Reduced features a 39mm case size, automatic 3220 movement, and is very wearable on most wrists.
- Condition: Good overall condition with light scratches from regular use
- Case size: 39mm
- Movement: 3220 automatic
- Bracelet type: Uncle's flat link