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 White 42MM - Ref 310.30.42.50.04.001 - 04/25

Omega - 310.30.42.50.04.001 · $6,800

A 42MM Omega Speedmaster Professional White, a popular and highly sought-after model known for its reliability and style.

Condition: preowned in fantastic condition
Case size: 42mm

Posted at

Oct 26, 2025, 6:16 PM

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Omega Speedmaster FOIS 40mm Numbered Edition – Excellent Condition, New Lincoln Bracelet, Professional Ed White Mod, Box + Warranty Card

Omega - FOIS · $4,250

Up for sale is my Numbered Editon Omega Speedmaster FOIS (First Omega in Space) in very good condition, featuring a professionally installed Ed White–style mod that gives it a beautifully vintage, classic Speedmaster look.

Condition: Excellent overall with light, honest wear
Bracelet: Uncle Seiko Lincoln bracelet, 6.75 inches long with extra links
Case Size: 40mm diameter

Posted at

Oct 26, 2025, 2:51 PM

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Omega Speedmaster Moonphase

Omega - 3575.20 · $5,225

Up for sale is an Omega Speedmaster Moonphase ref. 3575.20 in excellent condition! Very minimal signs of wear, runs great and includes full kit.

Condition: Excellent
Shipping restrictions: CONUS only

Posted at

Oct 26, 2025, 2:01 PM

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2023 Omega Speedmaster Moonwatch Professional | 310.30.42.50.01.002 | Complete | Sapphire Sandwich | Speedy | Micro-adjust Clasp

Omega - 310.30.42.50.01.002 · $6,417

A gorgeous watch highlighted by the two sapphire crystals, and makes for arguably the perfect daily; comfortable, simple, and practical.

Condition: Excellent
Reference type: Professional
Crystal material: Sapphire
Movement: Calibre GA

Posted at

Oct 26, 2025, 12:26 PM

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NEW 2025 Omega Speedmaster Professional Moonwatch ‘Silver Snoopy Award’ - Ref. 310.32.42.50.02.001 - $14,430

Omega - 310.32.42.50.02.001 · $14,430

The 'Silver Snoopy Award' 50th Anniversary edition Omega Speedmaster Professional Moonwatch features blue sub-dials and a bezel, along with a unique caseback.

Condition: Brand New
Year: 2025
Set Contents: full set with inner + outer box, cards, special loupe, cleaning cloth and instruction manuals

Posted at

Oct 26, 2025, 7:53 AM

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2024 Omega Speedmaster Moonwatch Sapphire REF 31030425001002 Full kit (Box, Papers, Extra links)

Omega - 31030425001002 · $6,999

2024 Omega Speedmaster Moonwatch Sapphire in excellent condition, barely worn, and well-kept. Includes full box, papers, extra links, and owners manual.

Condition: Pre-owned (2024 piece, well kept and in amazing condition)
Year: 2024
Included Accessories: Full box, papers, extra links, owners manual

Posted at

Oct 26, 2025, 12:14 AM

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Omega Speedmaster Reduced 3510.50 Recently Serviced

Omega - 3510.50.00 · $2,300

The Omega Speedmaster Reduced ref. 3510.50.00 delivers the iconic Moonwatch look in a more compact, automatic format, with its 39 mm stainless-steel case and black dial.

Condition: Excellent overall following a recent complete service
Case Diameter: 39mm
Case Material: Stainless steel
Bezel: Black aluminum tachymeter (minor mark near '60')

Posted at

Oct 25, 2025, 11:05 PM

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Omega Speedmaster3590.50 – Unpolished Classic

Omega - 3590.50 · $55,000

a classic, unpolished Omega Speedmaster with a unique character

Material: steel
Band: leather strap

Posted at

Oct 25, 2025, 9:37 PM

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: Omega Speedmaster Professional Moonwatch Full kit 12/24

Omega - Speedmaster Professional Moonwatch Hesalite · $4,950

This Omega Speedmaster Professional Moonwatch Hesalite is a full kit in very good condition. It features a Hesalite crystal and comes with a warranty card dated 12/24.

Condition: Very nice shape, small marks and scratches
Warranty card date: 12/24
Shipping method: FedEx

Posted at

Oct 25, 2025, 7:34 PM

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