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.

Buy Now on Jomashop

This is an affiliate link

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 (310.30.42.50.04.001)

Omega - 310.30.42.50.04.001 · $7,600

This Omega Speedmaster Professional features a white dial on a steel bracelet and comes with boxes, booklet, and warranty card dated 8/19/2025.

Condition: Excellent
Case Size: 42mm diameter
Bracelet Links: all links included
Movement: Manual Caliber 3861

Posted at

Apr 27, 2026, 6:57 AM

Active

View listing on r/WatchExchange

Incredible Vintage 18K Good Omega Speedmaster “Tribute To Astronauts” Ref BA145.022 Unpolished Collector Example!

Omega - BA145.022 · $47,500

This is a rare and historic Omega Speedmaster 'Tribute to Astronauts' ref BA145.022-69, one of only 1014 made in 1969. It features an 18K gold dial, correct maroon bezel, and solid 18K yellow gold case with patina.

Condition: Excellent, unpolished with patina
Case size: 42MM
Diameter: 42MM case diameter
Bracelet length: 7.5 inches

Posted at

Apr 26, 2026, 10:23 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Reduced 3510.21 Limited Edition (2,000 Pcs) Marui 39mm , B&P - $5,550

Omega - 3510.21 · $5,550

Up for sale is my Omega Speedmaster 3510.21 in great shape, measuring 39mm with an automatic movement.

Condition: Very good condition
Movement: automatic
Case size: 39mm diameter
Bracelet type: original Omega Steel bracelet

Posted at

Apr 26, 2026, 10:05 PM

Active

View listing on r/WatchExchange

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

Omega - 3211.30 · $3,500

This Omega Speedmaster features a silver dial, 40mm case size, and is part of the full set.

Condition: Excellent Condition
Water Resistance: unknown
Buckle Size: Fits 7.5"
Shipping Included: true

Posted at

Apr 26, 2026, 10:02 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Racing - 329.30.44.51.01.001 - Box and Papers - Price Reduced

Omega - 329.30.44.51.01.001 · $5,750

This Omega Speedmaster Racing Chronograph is a pre-owned model with a 44.25mm case size, featuring a chronograph function and minor wear throughout.

Condition: pre-owned with minor wear
Size: 44.25mm diameter
Bracelet material: stainless steel

Posted at

Apr 26, 2026, 8:39 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Professional Moonwatch Hesalite Ref. 310.30.42.50.01.001 2022

Omega - 310.30.42.50.01.001 · $5,550

A modern Omega Speedmaster Professional Moonwatch Hesalite with a classic vintage-inspired look and updated Co-Axial Master Chronometer movement, in the reference number 310.30.42.50.01.001.

Condition: good pre-owned condition
Movement type: Co-Axial Master Chronometer

Posted at

Apr 26, 2026, 7:32 PM

Active

View listing on r/WatchExchange