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 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] 2025 Omega Speedmaster Racing Edition Jomashop Full Set $3️⃣,3️⃣5️⃣0️⃣ shipped 🇺🇸](https://preview.redd.it/o5zpq306c8zg1.jpg?width=640&crop=smart&auto=webp&s=57b248c99c55becc68cc5c9cdaa3c554bdac444c)
2025 Omega Speedmaster Racing Edition Jomashop Full Set $3️⃣,3️⃣5️⃣0️⃣ shipped 🇺🇸
This is a 2025 Omega Speedmaster Racing Edition with a 40mm case size, coming as a full set including the outer and inner box, links, booklet, hang tag, and Jomashop warranty card.
- Case size: 40mm
![[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
![[WTS] Omega Speedmaster Chrono Blue Dial 43mm - 329.30.43.51.03.001 Full Set - Like New Condition - Houston, TX 🔥💰6,297💰🔥 + 🏷️](https://preview.redd.it/rgljxhlw67zg1.jpg?width=640&crop=smart&auto=webp&s=6dc971e851dde4670792b0af5003cf8ef48e697f)
Omega Speedmaster Chrono Blue Dial 43mm - 329.30.43.51.03.001 Full Set - Like New Condition - Houston, TX 🔥💰6,297💰🔥 + 🏷️
The Omega Speedmaster Chronoscope is a stylish and functional wristwatch designed for unisex adults, featuring a blue dial with spiral pattern and Arabic numerals, housed in a stainless steel case.
- Condition: Like new condition, both mechanically and cosmetically.
- Case size: 43mm
- Movement type: Mechanical manual
- Water resistance: 50m
![[WTS] Omega Speedmaster OEM Rubber Strap & Deployant Clasp](https://preview.redd.it/uhlq2l2m66zg1.jpg?width=640&crop=smart&auto=webp&s=ffa46be41754748ce05f5d8a125d36da23ff676b)
Omega Speedmaster OEM Rubber Strap & Deployant Clasp
Up for sale is an Omega Speedmaster's OEM rubber strap and its clasp, in excellent condition. The deployant clasp was not used due to personal preference.
- Material: rubber
- Clasp type: deployant