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 Speedy Tuesday - MINT UNWORN $14,500

Omega - ST1 · $14,500

Up for sale is the Speedy Tuesday ST1 in mint condition, never worn or modified.

Condition: Mint unworn
Case size: 42mm diameter
Water resistance: 50m depth rating

Posted at

Mar 16, 2026, 2:07 PM

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2019 Omega Speedmaster (FOIS) - 311.32.40.30.01.001 - Box and Papers - $4,295 Shipped ✈️

Omega - 311.32.40.30.01.001 · $4,295

This is the highly sought-after “First Omega in Space” Speedmaster, featuring the classic straight-lug case and vintage-inspired design.

Condition: pre-owned, with very minimal wear
Case size: 39.7mm diameter
Model edition: Numbered Edition

Posted at

Mar 16, 2026, 1:40 PM

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Omega Speedmaster Professional White Dial 3861 Moonwatch | Full Set | Omega Boutique 11/2024 | $7,500 Shipped

Omega - 310.30.42.50.04.001 · $7,500

This is the current 3861 manual-wind Moonwatch with a white lacquer dial on bracelet, one of the best modern Speedmaster references Omega makes.

Condition: Very good overall condition with normal light wear from careful use.
Dial color: white lacquer
Bracelet links included: true
Box and papers included: true

Posted at

Mar 16, 2026, 10:59 AM

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Omega Speedmaster Chronograph – Ref. 331.22.42.51.01.001 – 2024 – Full Set – $7,400

Omega - 331.22.42.51.01.001 · $7,400

A Omega Speedmaster Chronograph with a 2024 model and full set, available for sale.

Year: 2024

Posted at

Mar 16, 2026, 10:16 AM

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Omega Speedmaster Reduced 175.00.33 Gold Dial 39mm Automatic $2,625

Omega - 175.00.33 · $2,625

Selling an Omega Speedmaster Reduced 39mm Auto Gold Dial, watch only with aftermarket bracelet and additional strap.

Case size: 39mm diameter
Bracelet length: 16.5cm
Strap included: true

Posted at

Mar 16, 2026, 3:19 AM

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2025 Omega Speedmaster Meteorite Moonphase Complete set + Serialized AD Sales Receipt

Omega - 304.30.43.52.01.001 · $85,000

The Omega Speedmaster Moonphase Meteorite features a unique dial made from genuine meteorite, set into a beautifully finished piece of cosmic history on your wrist.

Condition: Excellent pre-owned condition
Year: 2025
Case size: 43mm diameter
Dial material: meteorite

Posted at

Mar 16, 2026, 12:13 AM

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Omega Speedmaster TV Dial

Omega - Speedmaster TV Dial · $4,000

A hard-to-find Omega Speedmaster with a unique 'TV dial' design from the late 1970s. It's currently running and keeping time but requires servicing on its pushers.

Condition: Pre-owned, unpolished with pusher issues requiring service
Pusher service needed: true
Original ownership duration: 40 years

Posted at

Mar 15, 2026, 9:13 PM

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Omega Speedmaster Professional Moonwatch (Hesalite)

Omega - 311.30.42.30.01.005 · $5,200

This Omega Speedmaster Professional Moonwatch Hesalite is a pre-3861 Speedmaster powered by manual-wind Caliber 1861, continuing the lineage of historic Moonwatch models.

Condition: Very Good
Year: 2020
Power source: Manual-Wind Caliber 1861
Warranty period: 2 years

Posted at

Mar 15, 2026, 7:37 PM

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