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

[US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

Omega - 310.30.42.50.01.004 · $10,650

This Omega Speedmaster Moonwatch Professional features a 42mm case and is in pristine condition with zero hairlines.

Condition: Brand new, unworn, and in pristine condition
Case Size: 42mm

Posted at

May 18, 2026, 6:09 AM

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Omega Speedmaster 38 Co-Axial Chronograph — Box and Papers — Ref. 324.30.38.50.01.001 — Excellent Condition

Omega - 324.30.38.50.01.001 · $5,000

The Omega Speedmaster 38 Co-Axial Chronograph is a discontinued reference with full Speedmaster heritage in a 38mm case, featuring a black tri-register dial and COSC chronometer certification.

Condition: Excellent
Case size: 38mm
Movement: Omega Co-Axial Calibre 3330 - Automatic Chronograph
Dial color: Black

Posted at

May 17, 2026, 11:55 PM

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Omega Speedmaster Dark Side Of The Moon Pitch Black. Complete set. $7200

Omega - 311.92.44.51.01.004 · $7,200

A bold and ultra-modern take on the iconic Moonwatch, made entirely from sleek black ceramic.

Condition: Excellent, mint-tier condition with virtually no signs of wear
Case Size: 44.25mm diameter
Movement: OMEGA Calibre 9300 Co-Axial Automatic Chronometer with 60-Hour Power Reserve

Posted at

May 17, 2026, 9:42 PM

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[WTS] FIRST ONE WAS GIVEN TO THE PRESIDENT! Rare Vintage 18K Gold Omega Speedmaster “Tribute to Astronauts” Ref BA145.022 - Unpolished Collector Dream!

FIRST ONE WAS GIVEN TO THE PRESIDENT! Rare Vintage 18K Gold Omega Speedmaster “Tribute to Astronauts” Ref BA145.022 - Unpolished Collector Dream!

Omega - BA145.022-69 · $47,500

This is one of the coolest watches ever made, a rare vintage 18K gold Omega Speedmaster 'Tribute to Astronauts' ref BA145.022-69. Only 1014 were made, starting in November 1969, and this is one of them.

Condition: Unpolished, all original with incredible patina forming on the gold
Dial material: 18K gold
Bezel condition: Correct DON (dot over 90) maroon bezel with light wear
Case size: 42MM

Posted at

May 17, 2026, 9:26 PM

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Rare Vintage Omega Speedmaster Teutonic Hand Wound Gray Dial Ref 145.0044 - $2750 SHIPPED!

Omega - 145.0044 · $2,750

A rare vintage Omega Speedmaster Teutonic Hand Wound Gray Dial, made for the German market in the early 1980s, characterized by its bead-blasted case and integrated bracelet.

Condition: Pre-owned with wear, mostly scratches and nicks on the bezel
Case size: 42MM diameter
Bezel condition: Ghost with scratches and nicks
Crystal type: Sapphire

Posted at

May 17, 2026, 9:15 PM

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NEW Omega Speedmaster Pilot 40.85MM Black Dial Steel Bracelet 332.10.41.51.01.002

Omega - 332.10.41.51.01.002

Posted at

May 17, 2026, 7:28 PM

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Omega / Speedmaster date / Silver Dial / 40mm / Full Set

Omega - 3211.30.00 · $3,250

A silver dial Omega Speedmaster date watch in excellent condition, 40mm in size.

Condition: Excellent Condition
Case Size: 40mm

Posted at

May 17, 2026, 7:24 PM

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Omega Speedmaster Professional Moonwatch 310.30.42.50.01.002 – 2023 – Sapphire – Full Set

Omega - 310.30.42.50.01.002 · $6,799

A manually-wound Omega Speedmaster Professional Moonwatch with a 42mm stainless steel case and black dial, featuring a Master Chronometer certification.

Condition: Excellent
Case Size: 42mm diameter
Water Resistance: unknown
Crystal Type: Sapphire

Posted at

May 17, 2026, 6:59 PM

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