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 Professional Hesalite I 310.30.42.50.01.001 | Dated 03/2023 | $5,399

Omega - 310.30.42.50.01.001 · $5,399

This Omega Speedmaster Professional Hesalite I is a manual wind, mechanical watch with a stainless steel case and black dial, featuring hesalite crystal.

Condition: Preowned, Very Good Condition
Case Material: Stainless Steel
Band Material: Stainless Steel
Movement Type: Manual Wind, Mechanical

Posted at

Mar 15, 2026, 3:45 PM

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Omega Speedmaster Japan Edition 3211.50.00

Omega - 3211.50.00 · $2,599

This Omega Speedmaster Japan Edition is in great pre-owned condition with limited signs of wear throughout.

Condition: pre-owned with limited signs of wear
Case Size: 40mm diameter

Posted at

Mar 15, 2026, 1:58 PM

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Omega Speedmaster GSOTM Meterorite, Full Set w/ Extra Strap

Omega - 311.63.44.51.99.001 · $12,000

A mint condition Omega Speedmaster Grey Side of the Moon Meteorite, a limited edition timepiece featuring a solid Sedna gold bezel and ceramic case, available with an original gray alligator leather strap as well as an additional brand new black alligator leather strap.

Condition: Excellent
Case size: 44.25mm
Movement: Automatic
Case material: Ceramic

Posted at

Mar 15, 2026, 1:18 PM

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Omega Speedmaster Date 40 Box Papers Excellent Condition Blue Dial

Omega - 3212.80.00 · $3,198

The Omega Speedmaster Date Chronograph is one of OMEGA's most iconic timepieces, featuring a date window and iconic Seamster logo on the caseback.

Condition: Excellent Condition
Case Material: Steel
Bracelet Material: Bracelet
Box Papers: Yes

Posted at

Mar 15, 2026, 1:14 PM

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Omega Speedmaster Silver 40 Box Papers

Omega - 3212.80.00 · $2,999

The Omega Speedmaster is a chronograph date watch with small seconds and tachymeter, featuring an iconic design.

Condition: Pre-Owned with minor scratches
Case Material: Steel
Bracelet Material: Bracelet
Dimensions: 40 mm diameter

Posted at

Mar 15, 2026, 1:05 PM

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Omega Speedmaster. 39mm. Mother of Pearl Dial. Clean. OEM Strap/Deployant Clasp..

Omega - Speedmaster · $2,350

This Omega Speedmaster features a 39mm case and mother of pearl dial.

Condition: Clean
Case Size: 39mm
Strap Type: OEM Strap/Deployant Clasp

Posted at

Mar 15, 2026, 11:32 AM

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2022 Omega Speedmaster Moonwatch Professional – 310.30.42.50.01.001 - $5899 Shipped

Omega - 310.30.42.50.01.001 · $5,899

For sale is a 2022 Omega Speedmaster Moonwatch Professional in excellent condition, showing light signs of normal wear and running properly.

Condition: Excellent overall condition with light signs of normal wear only
Case size: 42mm
Movement type: Manual wind chronograph
Crystal material: Hesalite

Posted at

Mar 15, 2026, 2:41 AM

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Omega Speedmaster Reduced 39mm Ref. 175.0032 Cal 1140 TRITIUM PATINA

Omega - 175.0032 · $2,550

This Omega Speedmaster Reduced features a beautiful tritium patina on its dial, giving it an authentic vintage character.

Condition: Honest signs of use consistent with its age, scratches on case and bracelet
Movement: Omega Caliber 1140 Automatic (46 jewels)
Case Size: 39mm
Caseback: Solid Omega press on caseback

Posted at

Mar 15, 2026, 1:38 AM

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Omega Speedmaster Professional Moonwatch ref. 145.022 circa 1978

Omega - 145.022 · $4,400

A circa 1978 Omega Speedmaster Professional Moonwatch ref. 145.022, featuring a Lemania based caliber 861 movement, in a classic 42mm case.

Condition: Used, with wear and signs of polish
Movement: Lemania based caliber 861
Case size: 42mm diameter
Lug width: 20mm

Posted at

Mar 14, 2026, 8:50 PM

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