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 Ref. 145.012-67 SP. Pre-Moon Full Collector's Set!

Omega - 145.012-67 · $17,000

This Omega Speedmaster Professional Ref. 145.012-67 SP is a Pre-Moon Speedmaster in its final and most desirable form. It's a full set with the original Omega box and international guarantee papers dated August 22, 1968.

Condition: Pre-owned, with signs of wear consistent with age
Movement: Caliber 321 (Serial 26.xxx.xxx)
Case size: 42mm diameter
Bracelet type: 1039/516 flat-link-style

Posted at

May 8, 2026, 5:41 PM

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Omega. Speedmaster. Date Chrono. Great Condition. $1849 Only

Omega - 3513.50 · $1,849

A Omega Speedmaster Date Chrono in great condition, featuring a 39mm case.

Condition: 9/10
Bracelet length: ~6.75 inch
Case size: 39mm

Posted at

May 8, 2026, 3:31 PM

Active

View listing on r/WatchExchange

Omega. Speedmaster. Reverse Panda. $1849 Only

Omega - Speedmaster · $1,849

A well-maintained Omega Speedmaster, also known as a Reverse Panda, available for sale. The watch features a 39mm diameter and is on its original OEM bracelet.

Condition: 9/10
Bracelet size: 39mm diameter
Wrist fit: ~7inch

Posted at

May 8, 2026, 3:25 PM

Active

View listing on r/WatchExchange

2021 SERVICED Omega Speedmaster Apollo 8 Dark Side of the Moon 311.92.44.30.01.001 B&P

Omega - 311.92.44.30.01.001 · $8,500

The Omega Speedmaster Dark Side of the Moon Apollo 8 is one of the most striking modern Speedmasters — full black ceramic, skeleton dial, and a movement laser-engraved to look like the lunar surface. The yellow accents give it that bold, mission-ready look you can spot across the room.

Condition: Good condition with very few signs of wear, mainly on the leather strap
Case Size: 44.25mm
Movement Caliber: Omega Calibre 1861
Power Reserve: 48 hours

Posted at

May 8, 2026, 3:05 PM

Active

View listing on r/WatchExchange