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 Reduced 3510.50 Mint Full Set $3250

Omega - 3510.50 · $3,250

This Omega Speedmaster Reduced from 1998 features a stainless steel case, 39mm in diameter, and a matte black dial with Luminova. The watch has an automatic Omega caliber 3220 movement, which is an ETA 2890-2 with a Dubois-Depraz chronograph module.

Condition: Mint
Case material: Stainless steel
Case size: 39mm diameter
Movement type: Automatic Omega caliber 3220 (ETA 2890-2 with Dubois-Depraz chronograph module)

Posted at

Mar 17, 2026, 9:57 AM

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Omega Speedmaster 38 Co-Axial Chronograph 324.30.38.50.02.001

Omega - 324.30.38.50.02.001 · $3,500

A silver dial Omega Speedmaster 38 Co-Axial Chronograph in excellent condition. The watch features a chronograph function and is presented on a brown leather strap.

Condition: Excellent
Case condition: Minimal wear
Bracelet condition: Brand-new, unworn
Included accessories: Omega inner box, Omega outer box, Instruction manual, Pictograms card, Watchfinder certificate of authenticity, Original Omega stainless steel bracelet, Brown leather strap, Omega Cream Watch Pouch

Posted at

Mar 17, 2026, 8:49 AM

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Omega Speedmaster 3520.53 - $2,690

Omega - 3520.53 · $2,690

Up for sale is my Omega Speedmaster 3520.53, measuring 39mm with an automatic movement and steel case on an original Omega Steel speedmaster bracelet.

Condition: 8.8/10 - great shape with some usage marks and patina on subdials
Movement type: automatic
Case material: steel
Bracelet: original Omega Steel speedmaster bracelet

Posted at

Mar 16, 2026, 10:16 PM

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2020 Omega Speedmaster Racing 44.25mm 329.32.44.51.01.001 - Full set

Omega - 329.32.44.51.01.001 · $6,198

This Omega Speedmaster Racing features a 44.25mm case and a matt black dial with orange accents, powered by the Co-Axial Master Chronometer 9900.

Condition: great pre-owned condition
Case size: 44.25mm
Strap condition: leather strap has small amount of wear

Posted at

Mar 16, 2026, 5:58 PM

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2025’ Omega Speedmaster FOIS Complete Set

Omega - 310.30.40.50.06.001 · $7,000

A tribute to the first Omega watch worn in space, this updated Speedmaster FOIS captures the same style in modern form.

Condition: pre-owned with minor signs of wear
Case size: 40mm diameter
Box and papers: complete set, including inner & outer boxes, picto, chrono, warranty card, and booklet

Posted at

Mar 16, 2026, 5:24 PM

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Omega Speedmaster Professional Moonwatch Full Steel 145.022-69 Ghost Bezel Yellow Patina Step Dial 1969 (Serviced) 🔥

Omega - 145.022-69 · $5,250

This Omega Speedmaster Moonwatch presents beautifully in full steel, showcasing a strong and sharp case with thick lugs that retain their original shape.

Condition: Serviced, lightly polished case
Caliber movement serviced: November 2022
Bracelet size: up to 7.5 inch / 19cm wrist diameter
Case back type: flat case back

Posted at

Mar 16, 2026, 5:18 PM

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