Omega Speedmaster Speedmaster Professional Moonwatch Sapphire Sandwich / Strap

Reference 3873.50.31

Omega Speedmaster Professional Moonwatch Sapphire Sandwich / Strap

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.

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MSRP: $5,400

Market Price: $3,887

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

Current Listings

OMEGA Speedmaster Calibre 321 "Ed White" Ref. 311.30.40.30.01.001 - ULTIMATE SET!

OMEGA - 311.30.40.30.01.001 · $18,000

The OMEGA Speedmaster Calibre 321 Ref. 311.30.40.30.01.001 is a faithful recreation of the reference 105.003, famously worn by astronaut Ed White during America's first spacewalk. This stainless steel timepiece features the iconic straight lugs and removal of crown guards that defined the early pre-Moon Speedmasters.

Condition: UNWORN
Size: 39.7mm
Movement: Calibre 321 column-wheel chronograph movement
Bezel material: black ceramic

Posted at

Dec 15, 2025, 12:00 AM

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OMEGA Speedmaster "Dark Side of the Moon" Apollo 8 Ref. 311.92.44.30.01.001 + Apollo 8 Gen2 Strap + Deployant Clasp - ULTIMATE SET!

OMEGA - 311.92.44.30.01.001 · $10,000

The OMEGA Speedmaster 'Dark Side of the Moon' Apollo 8 is a 44.25mm black ceramic watch that commemorates the 50th anniversary of the Apollo 8 mission, featuring a skeletonized dial and laser-ablated details to represent the lunar surface.

Condition: [UNWORN]
Case material: black ceramic
Diameter: 44.25mm
Movement: Calibre 1869

Posted at

Dec 14, 2025, 11:54 PM

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Omega Speedmaster Moonphase Ref. 304.33.44.52.01.001 (2024) - Pre-Owned Very Good Condition w/ Box & Papers

Omega - 304.33.44.52.01.001 · $7,495

This is a stunning example of the iconic black-dial Moonphase Speedmaster with legendary METAS-certified Calibre 9904, photo-realistic moonphase discs, blue liquidmetal tachymeter bezel, and transparent caseback.

Condition: Pre-Owned very good condition
Case Diameter: 44.25mm
Movement: Automatic, Calibre 9904
Water Resistance: 10 ATM

Posted at

Dec 14, 2025, 10:29 PM

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Omega Speedmaster Spiralwinder Ceramic Bezel for 3861

Omega - 3861 · $150

This is a Speedmaster Spiralwinder ceramic bezel insert designed for the 3861 Speedmaster Professional cases. It features a deep black ceramic with crisp white numerals and a DON90 tachymeter layout.

Compatible Reference: 3861
Bezel Material: ceramic
Tachymeter Layout: DON90 (Dot Over 90)

Posted at

Dec 14, 2025, 10:14 PM

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Omega Omega Speedmaster 38 Co-axial Chronograph Ref. 324.32.38.50.02.001 (2024) - Pre-Owned Very Good Condition w/ Box & Papers

Omega - 324.32.38.50.02.001 · $3,750

This Omega Speedmaster 38 Coaxial Chronograph features an elegant silver dial, chronograph functionality, and automatic movement in a stainless steel case with 10 ATM water resistance and 38mm diameter.

Condition: Pre-Owned very good condition
Case material: stainless steel
Diameter: 38mm
Movement: automatic Calibre 3330

Posted at

Dec 14, 2025, 10:07 PM

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Omega Speedmaster Professional Moonwatch Tropical Brown Dial Heavy Patina Blue Insert 1969 (Box/Serviced) 🟤

Omega - 145.022-69 · $15,150

This rare and fully original Omega Speedmaster Moonwatch features a stunning tropical brown dial with deep yellow patina across all indices and matching hands. The original blue bezel has aged attractively, taking on a rich blue tone that pairs perfectly with the tropical dial.

Condition: Very rare and fully original, beautiful condition
Size: 42mm diameter
Year: 1969
Case Back Type: flat case back

Posted at

Dec 14, 2025, 7:08 PM

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