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 39mm Watch Only $2,500

Omega - 3510.50 · $2,500

A Speedmaster Reduced from Omega, a watch only sale with the bracelet fitting about 18cm wrists.

Shipping origin: Singapore
Shipping to usa: 4-5 business days
Payment methods: Wise, Revolut, Wire Transfer, Crypto, Venmo

Posted at

Mar 11, 2026, 5:20 AM

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Omega Speedmaster Professional Moonwatch (Hesalite)

Omega - 310.30.42.50.01.001 · $5,750

This modern Omega Speedmaster Professional Moonwatch features Master Chronometer technology, a stainless steel case, and a black anodized aluminum tachymeter bezel.

Condition: Excellent
Case size: 42mm
Movement type: Co-Axial Master Chronometer Caliber 3861
Power reserve: 50 hours

Posted at

Mar 11, 2026, 12:04 AM

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Omega Speedmaster Automatic Day-Date 3520.50.00 MK 40 | Great Condition (Serviced) | $2450

Omega - 3520.50.00 MK 40 · $2,450

The Omega Speedmaster Automatic Day-Date features a stainless steel case with a twisted-lug design and domed sapphire crystal, powered by the modified Valjoux 7751 automatic chronograph movement.

Condition: Great condition, serviced
Movement: Omega 1151 (modified Valjoux 7751)
Case dimensions: 39mm diameter, 44.75mm lug-to-lug, 14mm thick
Lug width: 18mm

Posted at

Mar 10, 2026, 10:34 PM

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Omega Speedmaster Reverse 🔥BNIB 3/2026, $10.5k +Shipping🔥

Omega - 310.30.42.50.01.004 · $10,500

The Omega Speedmaster Reverse is being sold as a brand new watch with a reference number of 310.30.42.50.01.004.

Condition: Brand New
Serial Number: not found
Depth Rating: not found
Water Resistance: not found

Posted at

Mar 10, 2026, 10:19 PM

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Omega Speedmaster Professional Hesalite | 310.30.42.50.01.001 | Dated 03/2023 | $5500 OBO

Omega - 310.30.42.50.01.001 · $5,500

This Omega Speedmaster Professional Moonwatch features a stainless steel case with a black dial and Hesalite crystal, powered by a manual wind mechanical movement.

Condition: Very Good Condition
Case Dimensions: 42mm diameter
Bezel: stainless steel black
Dial Color: black

Posted at

Mar 10, 2026, 9:55 PM

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2024 OMEGA SPEEDMASTER PROFESSIONAL- WHITE DIAL - FULL KIT - $7,800

Omega - 310.30.42.50.04.001 · $7,800

The 2024 White Dial Omega Speedmaster Professional features a glossy, lacquered white stepped dial with applied blackened markers and hands. It is powered by the METAS-certified Master Chronometer Calibre 3861 and viewed through a sapphire exhibition caseback.

Condition: Great condition/minor desk diving
Movement: Manual-winding Calibre 3861 (Anti-magnetic to 15,000 gauss)
Dial size: 42mm
Water resistance: unknown

Posted at

Mar 10, 2026, 9:38 PM

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Omega Speedmaster Moonwatch 310.30.42.50.01.002 - Legendary Timepiece

Omega - 310.30.42.50.01.002 · $6,900

The Omega Speedmaster Professional Moonwatch, reference 310.30.42.50.01.002, is an iconic timepiece that combines precision with timeless design. Featuring a robust stainless steel case and a classic black dial, it's not just a watch—it's a piece of history.

Condition: Good
Case material: stainless steel
Dial color: black

Posted at

Mar 10, 2026, 5:32 PM

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