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 Dark Side of the Moon "Apollo 8" 44.25MM 311.92.44.30.01.001
The Omega Speedmaster Dark Side of the Moon features a super lightweight ceramic case, an insane skeleton dial with a laser-etched lunar surface, and a hand-wound 1869 movement.
- Condition: Excellent Condition
- Case material: ceramic
- Dial type: skeleton
- Movement type: hand-wound

2022 Omega Speedmaster Professional Moonwatch 310.30.42.50.01.002 Sapphire
A 2022 Omega Speedmaster Professional Moonwatch in like new condition, described by the seller as worse than it really is.
- Condition: Like new
- Material: Sapphire crystal


BNIB Omega SPEEDMASTER SILVER SNOOPY AWARD 50TH ANNIVERSARY 2025 FULL SET
A 2025 Omega Speedmaster Professional Moonwatch, specifically the Silver Snoopy Award edition, featuring a 42mm stainless steel case and silver dial with blue subdials. This watch is part of the 50th Anniversary celebration and comes with a full set of accessories and documentation.
- Condition: Brand New in Box (BNIB)
- Case Size: 42mm
- Movement:
- Water Resistance:

Omega Speedmaster Moonwatch White Dial 310.30.42.50.04.001
Up for sale is the Omega Speedmaster Moonwatch White Dial, a beautiful watch under factory warranty until August 2029.
- Condition: Mint condition with minor signs of wear
- Warranty Start Date: August 2024
- Msrp: 8100
- Comes With: Outer Box, Inner Speedmaster Box, Operating Instructions, Moonwatch Booklet, Pictograms Card, Master Chronometer Card, International Warranty Card

Omega Speedmaster Moonwatch Sapphire Sandwich-310.30.42.50.01.002
A direct descendant of the watch worn on the Moon, this Omega Speedmaster Moonwatch features a classic asymmetrical 42mm stainless steel case and black stepped dial, powered by a hand-wound Co-Axial Master Chronometer 3861 movement.
- Condition: EXCELLENT, very light signs of use
- Case Size: 42mm diameter
- Material: stainless steel
- Bezel: black aluminum with tachymeter scale

Omega Speedmaster �Dark Side of the Moon� 311.92.44.51.01.007
A bold reimagining of the iconic Moonwatch, crafted from a single block of black ceramic with a stunning black zirconium oxide dial and Co-Axial Master Chronometer movement.
- Condition: EXCELLENT - Very light signs of wear, if any
- Case Size: 44.25mm diameter
- Material: Black Ceramic
- Bezel: Black Ceramic with Tachymeter Scale

Omega SPEEDMASTER MOONPHASE 18K YELLOW GOLD STEEL GREEN BEZEL GREY DIAL 2024
This Omega Speedmaster Moonwatch features a 18K yellow gold and stainless steel case with a green ceramic bezel and grey dial.
- Condition: Excellent, unpolished condition
- Case size: 44.25mm diameter
- Movement: Omega Co-Axial Master Chronometer 9904 chronograph movement
- Warranty: under 5 years factory warranty remaining
Omega Speedmaster Reduced "Marui" - 3510.21 - White - Steel - 39mm
A vintage Omega Speedmaster Reduced 'Marui' watch in excellent condition, featuring a white dial and stainless steel case.
- Condition: Pre-Owned, Excellent Grade
- Case Size: 39mm diameter
- Material: Stainless Steel
- Dial Color: White