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 First Omega in Space - FOiS - 310.30.40.50.06.001 - Full Set

Omega - 310.30.40.50.06.001 · $7,525

Up for sale is an Omega Speedmaster First Omega in Space - FOiS - Full Set, which functions perfectly mechanically without issue.

Condition: Fantastic with few hairlines
Case Condition: few hairlines on case, clasp, and bracelet
Box Status: Full Set

Posted at

Apr 28, 2026, 8:44 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Moonwatch (Reverse Panda) – Full Kit

Omega - Speedmaster Moonwatch (Reverse Panda) · $10,250

A classic Omega Speedmaster Moonwatch with an updated Co-Axial Master Chronometer movement, available as a full set including box, papers, and cards.

Condition: Amazing, slight mark on the case
Size: 40mm diameter
Movement: Cal. 3861
Power reserve: ~50 hours

Posted at

Apr 28, 2026, 1:33 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Triple Calendar Blue Sunburst Dial 3523.80 39mm | Great Condition (Serviced) | $2500

Omega - 3523.80 · $2,500

The Omega Speedmaster Triple Calendar is a compact watch with a blue sunburst dial featuring a tachymeter scale and multiple complications. The stainless steel case measures approximately 44.7mm lug-to-lug and has an 18mm lug width.

Condition: Great condition, recently serviced
Case Size: 39mm diameter
Lug Width: 18mm
Lug To Lug: 44.7mm

Posted at

Apr 27, 2026, 10:20 PM

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View listing on r/WatchExchange

Omega Speedmaster Pro White Dial

Omega - 310.32.42.50.04.001 · $6,999

A beautiful Omega Speedmaster Pro with a white dial is up for sale, featuring a manual wind movement and coming as a full kit with card dated 09/2025.

Condition: great condition with minimal wear on the case
Size: 42mm diameter
Movement: 3861 manual wind movement

Posted at

Apr 27, 2026, 9:28 PM

Active

View listing on r/WatchExchange

Omega Speedmaster. Mother of pearl dial. 39mm. Automatic.

Omega · $2,100

This Omega Speedmaster features a 39mm automatic movement and a beautiful mother of pearl dial, along with gorgeous lume and an OEM omega strap.

Case Size: 39mm diameter
Movement Type: Automatic

Posted at

Apr 27, 2026, 6:33 PM

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2025 Omega Speedmaster Silver Snoopy Award Full Set

Omega - 310.32.42.50.02.001 · $15,499

The Omega Speedmaster Silver Snoopy Award 50th Anniversary is a highly sought-after model that celebrates the brand's historic relationship with NASA and commemorates the Silver Snoopy Award presented to Omega in 1970 for its contributions to the Apollo 13 mission.

Case size: 42mm
Movement: Manual Wind, Omega Caliber 3861 (Master Chronometer Certified)
Dial color: Silver with blue accents

Posted at

Apr 27, 2026, 4:08 PM

Active

View listing on r/WatchExchange