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 Professional 3572.50 $4250](https://preview.redd.it/9gm24nl0f7yg1.jpeg?auto=webp&s=f43d6332cdb3b1b4ef22626e2c5ac36fc2f71581)
Omega Speedmaster Professional 3572.50 $4250
This rare Omega Speedmaster Professional features a hesalite crystal and sapphire exhibition crystal, showcasing the 1863 movement.
- Condition: Good used condition with slight scuffs and marks
- Bracelet type: 1498/840
- Bracelet taper: 20mm-16mm
![[WTS] 1450 President Bracelet for Omega Speedmaster Professional 20mm - Uncle Straps / Uncle Seiko](https://preview.redd.it/8nzsi5my97yg1.jpg?width=640&crop=smart&auto=webp&s=9b3cbcf8de4bc22d25b600e9e89be81aef5b0886)
1450 President Bracelet for Omega Speedmaster Professional 20mm - Uncle Straps / Uncle Seiko
·
$80
A Presidential/Lincoln bracelet for the Omega Speedmaster Professional that can be adjusted to fit different model sizes. It includes two clasp options and is made of 316L stainless steel.
- Condition: good with normal desk diving scrapes on the clasps
- Lug width to buckle: 20mm to 16mm
- Length: 180mm
- Min length after adjusted: 120mm
![[WTS] Brand New Omega Speedmaster Moonwatch "Sapphire Sandwich" [ Ref. 310.30.42.50.01.002 ]](https://preview.redd.it/mfku7hj5o6yg1.jpeg?auto=webp&s=7d5830329eac5e15146867dea94d42e11422b141)
Brand New Omega Speedmaster Moonwatch "Sapphire Sandwich" [ Ref. 310.30.42.50.01.002 ]
This listing is for a brand new Omega Speedmaster Moonwatch Professional in the 'Sapphire Sandwich' style. It comes as a full set with various accessories.
- Condition: Brand new, unworn
- Case size: 42mm diameter
![[WTS] Omega OEM deployant 16mm buckle width length (fits 20mm speedmaster straps)](https://preview.redd.it/msr7qpntc6yg1.jpg?width=640&crop=smart&auto=webp&s=05ae7657bd076d500b3e5c08041faf1002678d29)
Omega OEM deployant 16mm buckle width length (fits 20mm speedmaster straps)
A stainless steel Omega OEM deployant buckle for watches with a 20mm strap width.
- Condition: no condition found
- Buckle width: 16mm
- Compatible with straps: 20mm speedmaster straps
- Retail price: $310
![[WTS] Omega Speedmaster Date 3513.50](https://preview.redd.it/wmwstsohb6yg1.jpg?width=640&crop=smart&auto=webp&s=d6b451c4cae0744639f5d34bf43f9cdaac67374c)
Omega Speedmaster Date 3513.50
- Model name: Speedmaster Date
![[WTS] 2026 NEW Omega Speedmaster Reverse Panda 310.30.42.50.01.004 Unworn](https://preview.redd.it/nu1muu2fa6yg1.jpg?width=640&crop=smart&auto=webp&s=7a651bd58a86fa31ab3ea7ad14b02b530e964e11)
2026 NEW Omega Speedmaster Reverse Panda 310.30.42.50.01.004 Unworn
This new Omega Speedmaster Reverse Panda is an unworn timepiece that comes with its full set, including the box and paperwork.
- Condition: Like New
- Year Of Manufacture: 2026
- Material: Stainless Steel
- Bracelet Material: Stainless Steel
![[WTS] Omega Speedmaster Reduced - 3510.50](https://preview.redd.it/60ok9vmtu5yg1.jpg?width=640&crop=smart&auto=webp&s=4eec9cf47f373ffd0abfc5872b70973cbe956801)
Omega Speedmaster Reduced - 3510.50
A Omega Speedmaster Reduced in good pre-owned condition, featuring a 39mm case size and chronograph function that will require service.
- Condition: good pre-owned condition
- Size: 39mm diameter
![[WTS] Omega Speedmaster 3519.50.00 “Schumacher World Champion 2001” LE — Racing Dial — $2,599 Shipped (Tariff Covered)](https://preview.redd.it/55u1l5pvq5yg1.jpg?width=640&crop=smart&auto=webp&s=88bdd34ad442386f4a561618fa4cf5fc5ab427d5)
Omega Speedmaster 3519.50.00 “Schumacher World Champion 2001” LE — Racing Dial — $2,599 Shipped (Tariff Covered)
This Omega Speedmaster ref. 3519.50.00 'Schumacher World Champion 2001' Limited Edition features a distinctive racing dial and is powered by an automatic chronograph movement.
- Condition: Honest condition with light signs of use
- Case size: 39mm
- Lug-to-lug: 44mm
- Thickness: 14mm
![[WTS] Omega Speedmaster Professional Sapphire - 310.30.42.50.01.002 - Full Kit - Price Reduced!](https://preview.redd.it/e2dz64pdo5yg1.jpg?width=640&crop=smart&auto=webp&s=3893330651290118c863b588e470b918b1e92255)
Omega Speedmaster Professional Sapphire - 310.30.42.50.01.002 - Full Kit - Price Reduced!
This Omega Speedmaster Professional features a sapphire crystal front and display caseback, showcasing the stunning omega movement.
- Condition: near like-new condition
- Size: 42mm diameter
- Kit contents: full kit with original double box, all 3 omega cards