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 3521.80 — Triple Date 39mm Blue Dial Automatic Chronograph – $1,599

Omega - 3521.80 · $1,599

This Omega Speedmaster features a 39mm stainless steel case, blue sunburst dial with triple calendar (day, date, month), and warm patina on gold-tone accents.

Condition: Light surface wear on case and bracelet, no dents or deep scratches
Case diameter: 39mm
Movement: Omega Calibre 1151 automatic chronograph (Valjoux 7751 base)

Posted at

Oct 31, 2025, 9:20 PM

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2024 Omega Speedmaster Professional Moonwatch White Dial 310.30.42.50.04.001 Full Set

Omega - 310.30.42.50.04.001 · $7,810

A 2024 Omega Speedmaster Professional Moonwatch with a white dial, stainless steel case, and manual wind movement.

Condition: Nice preowned with some scratches
Case Dimensions: 42mm diameter
Movement Type: Manual Wind, Mechanical

Posted at

Oct 31, 2025, 8:02 PM

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Omega "Silver Snoopy" Speedmaster 2025

Omega - 310.32.42.50.02.001 · $15,499

A commemorative Omega Speedmaster Silver Snoopy Award, presented in brand new condition, paying tribute to Omega's crucial role in the safe return of Apollo 13 with a highly detailed caseback animation and mission-inspired design language.

Condition: Brand new, unworn
Case size: 42 mm
Dial color: Silver
Bezel material: Blue ceramic

Posted at

Oct 31, 2025, 5:58 PM

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Omega Speedmaster extra links and see through caseback

Omega - Tokyo 2020 Speedmaster

For sale are additional details for an Omega Speedmaster, including a Spiralwinder see through caseback and installation tool, as well as 4 extra links for the new bracelet.

See through caseback: Spiralwinder, see through caseback and installation tool
Extra links: 4 extra links for the new bracelet with polished center links
Retail price of see through caseback: 120

Posted at

Oct 31, 2025, 4:32 PM

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Omega Speedmaster Chronoscope 329.30.43.51.02.001 – Full Set (2021) – Excellent Condition – Dallas TX

Omega - 329.30.43.51.02.001 · $6,000

Up for sale is my Omega Speedmaster Chronoscope ref. 329.30.43.51.02.001, a full set including inner & outer boxes, manual, and warranty cards dated 2021. This watch features a 43 mm steel case with a silver dial displaying a vintage multi-scale design.

Condition: Excellent Condition, near-mint (9.9/10)
Case size: 43 mm diameter

Posted at

Oct 31, 2025, 10:55 AM

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Omega Speedmaster Reduced 3510.50 39mm Automatic $2,450

Omega - 3510.50 · $2,450

Selling an Omega Speedmaster Reduced with a case size of 39mm, suitable for an 18cm wrist.

Case size: 39mm diameter
Wrist size compatibility: 18cm

Posted at

Oct 31, 2025, 5:19 AM

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Omega Speedmaster Moonwatch Professional 3861 – 2023 – Ref. 310.32.42.50.01.001 – Full Set – $4,800 Shipped (CONUS)

Omega - 310.32.42.50.01.001 · $4,800

This is a 2023 Omega Speedmaster Moonwatch Professional with a Co-Axial Master Chronometer 3861 movement, featuring a modern hesalite crystal and steel bracelet.

Condition: Good overall with a scratch on the hesalite crystal
Movement: Omega Calibre 3861 (Co-Axial Master Chronometer Manual Wind)
Case size: 42mm
Bracelet material: Stainless Steel

Posted at

Oct 30, 2025, 11:45 PM

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