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

1992 Omega Speedmaster Ref: 3590.50 with Patina
This 1992 Omega Speedmaster features a 42mm case, black bezel, tritium dial, and 1479 Omega bracelet.
- Condition: Excellent with some light wear and patina
- Serial Number: 48,28X,XXX
- Bracelet Length: 19 links

1993 Omega Speedmaster Ref: 3590.50�Sharp Case
A 1993 Omega Speedmaster Ref: 3590.50 with a sharp case, excellent bezel and insert, tritium dial with aged patina, and an excellent 1479 Omega bracelet.
- Condition: Excellent with light wear from use
- Case size: 42mm
- Serial number: 48,29X,XXX

Omega Speedmaster Chronoscope Blue 329.30.43.51.03.001
The Omega Speedmaster Chronoscope Blue is a complete set with box and papers, and comes with the original manufacturer's warranty until July 2029.
- Condition: Excellent condition, with just light wear visible on close inspection
- Warranty Valid Until: July 2029
- Shipping Method: FedEx Priority

OMEGA SPEEDMASTER PROFESSIONAL PRE-MOON 145.022-69 Unpolished
A pre-moon Omega Speedmaster Professional reference 145.022-69ST featuring a calibre 861 movement and hippocampus caseback.
- Condition: Good vintage condition
- Movement caliber: 861
- Case diameter: 42 mm
- Bezel hands status: newer replacements
Omega Speedmaster Date 18K PG/ SS Mens Watch 3316.50
The Omega Speedmaster Date is a chronograph watch with a date function and mechanical automatic movement, housed in a stainless steel and 18K pink gold case.
- Condition: 90%
- Case material: Stainless Steel/ 18K Pink Gold
- Movement type: Mechanical Automatic

NEW UNWORN 2025 Omega Speedmaster �Silver Snoopy Award� 310.32.42.50.02.001
The Omega Speedmaster 'Silver Snoopy Award' is a limited-edition timepiece that celebrates Omega's contributions to space exploration and the Apollo 13 mission.
- Condition: New, unworn
- Case material: stainless steel
- Dial color: silver
- Bezel material: blue ceramic

Omega 3861 Speedmaster Professional Moonwatch Hesalite Box Papers Warranty
A stainless steel Omega Speedmaster Professional Moonwatch with a black dial and hesalite crystal, featuring the Caliber 3861 manual winding co-axial movement.
- Condition: Near Mint, 96%
- Case size: 42mm
- Bracelet type: Stainless Steel Bracelet
- Movement: Omega Caliber 3861 Manual Winding Co-Axial Movement
Omega Speedmaster Automatic Chronograph Date 3813.53
A 39mm stainless steel Omega Speedmaster Automatic Chronograph Date watch powered by a mechanical automatic movement.
- Condition: 90%
- Size: 39mm
- Case material: stainless steel

Omega Speedmaster Ed White 311.30.40.30.01.001 � 2021
This Omega Speedmaster Ed White is the recently released, Cal 321 model, featuring an exhibition box, booklets, accessories, and a COSC-certified movement. It comes in excellent condition with a few minor imperfections.
- Condition: Excellent with some light hairlines and marks
- Case dimensions: 40mm diameter
- Bracelet length: adjusts to fit around a 7.75" wrist