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 FOIS, Numbered Edition, Very Clean (2017), $4200 shipped

Omega - 311.32.40.30.01.001 · $4,200

This Omega Speedmaster FOIS is a numbered edition from 2017 with a very clean and smooth action.

Condition: Very good
Caliber: Omega 1861
Power reserve: 48 hours
Case dimensions: [object Object]

Posted at

Dec 14, 2025, 3:05 PM

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Omega Dark Side of the Moon Speedmaster 311.92.44.30.01.001

Omega - 311.92.44.30.01.001 · $8,550

The Omega Speedmaster Dark Side of the Moon features a black zirconium oxide ceramic case, bezel, and crystal, with a black dial and applied indices.

Condition: Great overall with light signs of use on the strap
Case size: 44.25mm diameter
Movement: Omega Co-Axial Calibre 9300 automatic chronograph

Posted at

Dec 14, 2025, 2:45 PM

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Omega Speedmaster Professional Moonwatch model 145.022 78 ST fully serviced.

This is a description of the Omega Speedmaster Professional Moonwatch model 145.022 78 ST that has been fully serviced.

Posted at

Dec 14, 2025, 11:36 AM

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2022 Omega Speedmaster Chronoscope Co-Axial Master Chronometer 329.30.43.51.02.001

Omega - 329.30.43.51.02.001 · $5,500

A 2022 Omega Speedmaster Chronoscope Co-Axial Master Chronometer in good working order and excellent cosmetic condition. It comes with box and papers dated 2022.

Condition: Great condition overall
Case size: 43mm diameter
Movement: Co-Axial Master Chronometer
Box and papers included: yes

Posted at

Dec 14, 2025, 9:35 AM

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Omega Speedmaster Professional 42mm “Sapphire Sandwich” 310.30.42.50.01.002 - 11/2025 Complete Set

Omega - 310.30.42.50.01.002 · $7,350

This Omega Speedmaster Professional 42mm is a 'Sapphire Sandwich' model with a complete set, including a serial tag and master chronometer certification.

Condition: Like New
Case Size: 42mm

Posted at

Dec 13, 2025, 8:11 PM

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[WTS] Omega Speedmaster Broad Arrow 42mm Olympics (Milano Cortina Killer for Half the Price 🔥) - Blue Spiralwinder Ceramic Bezel - F.Piguet Based Column Wheel Coaxial Chrono - Forstner Bullet - Blued Hands - Moonwatch Proportions - Only $3,050 Shipped CONUS

Omega Speedmaster Broad Arrow 42mm Olympics (Milano Cortina Killer for Half the Price 🔥) - Blue Spiralwinder Ceramic Bezel - F.Piguet Based Column Wheel Coaxial Chrono - Forstner Bullet - Blued Hands - Moonwatch Proportions - Only $3,050 Shipped CONUS

Omega - Speedmaster Broad Arrow · $3,050

This Omega Speedmaster Broad Arrow features a white gloss dial with heat-blued hands and an Olympic Games caseback. It has 100m water resistance and is powered by the Co-Axial Caliber 3313 column-wheel automatic chronograph.

Movement: Omega Co-Axial Caliber 3313, column-wheel automatic chronograph based on the F. Piguet 1285 architecture
Bracelet: Forstner Bullet bracelet, 200m water resistance (100m WR)
Depth Rating: 100m WR

Posted at

Dec 13, 2025, 7:34 PM

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Omega Speedmaster Dark Side of the Moon 311.92.44.30.01.001 | Ceramic |FULL SET

Omega - 311.92.44.30.01.001 · $7,850

This is a 2019 Omega Speedmaster Dark Side of the Moon with a full-ceramic case and buckle, available in mint condition.

Condition: Mint, like-new condition
Case material: full ceramic
Year: 2019

Posted at

Dec 13, 2025, 6:06 PM

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Omega Speedmaster Silver Snoopy OEM bracelet and strap 310.32.42.50.02.001 PRICE REDUCED

Omega - 310.32.42.50.02.001 · $14,500

A mint condition Omega Speedmaster, purchased at an authorized dealer on December 24th, featuring a new case and excellent bracelet with minor hairlines.

Condition: Mint
Bracelet condition: Excellent
Bracelet description: OEM bracelet with a few hairlines present

Posted at

Dec 13, 2025, 12:55 PM

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Omega Speedmaster “The 1957 Trilogy” 60th Anniversary Limited Edition 311.10.39.30.01.001 - With accessories

Omega - 311.10.39.30.01.001

Posted at

Dec 13, 2025, 5:19 AM

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