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 Moon Watch • 20th Anniversary Apollo XI - Ref ST 145.0022.101 (ALL ORIGINAL / COMPLETE SET)

Omega - ST 145.0022.101 · $8,450

A 42MM Omega Speedmaster Moon Watch 20th Anniversary Apollo XI from 1989 with a beautiful patina and original bracelet. The calibre 861 is running well within COSC specs.

Condition: Excellent, unpolished
Bracelet length: 145mm
Case size: 42mm diameter
Movement type: Calibre 861

Posted at

Jan 30, 2026, 6:56 PM

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Omega Speedmaster. Triple Date. 39mm. Automatic...

Omega - Speedmaster Triple Date · $1,795

This Omega Speedmaster is a 39mm automatic chronograph with triple date functionality.

Case size: 39mm
Movement type: Automatic

Posted at

Jan 30, 2026, 6:01 PM

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Omega Speedmaster. MK40. Triple Date. 🔥

Omega - MK40 · $2,750

A 39mm Omega Speedmaster with automatic movement and triple date functionality, available for sale in New Jersey.

Case size: 39mm diameter
Movement type: Automatic

Posted at

Jan 30, 2026, 5:37 PM

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PRICE DROP 2023 Omega Speedmaster Moonphase Sedna Gold

Omega - 304.23.44.52.13.001 · $9,348

2023 Omega Speedmaster Moonphase Sedna Gold features a 44.25mm 18k Sedna gold case with a brown sun-brushed dial and precision moonphase display at 6 o'clock.

Condition: Excellent, with light signs of wear
Case size: 44.25mm
Case material: 18k Sedna Gold
Dial color: Brown sun-brushed

Posted at

Jan 30, 2026, 4:42 PM

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2025 Omega Speedmaster Professional Moonwatch Sapphire Sandwich $6,499

Omega - 310.30.42.50.01.002 · $6,499

The Omega Speedmaster Professional Moonwatch Sapphire Sandwich features a 42mm stainless steel case with a sapphire front and display case back, showcasing the updated Caliber 3861 movement. It offers enhanced durability, accuracy, and visibility of the beautifully finished movement.

Condition: Excellent condition - no dings, dents or scratches
Movement: Hand wound Cal 3861
Power reserve: 50 hours
Case size: 42mm diameter

Posted at

Jan 30, 2026, 12:36 PM

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Omega Speedmaster Moonwatch Professional 42mm White Dial 310.30.42.50.04.001 Complete

Omega - 310.30.42.50.04.001 · $7,650

This Omega Speedmaster Moonwatch Professional features a white dial and is in very good condition with minimal handling marks.

Condition: In very good condition, rated at 9.7/10
Case Diameter: 42mm
Included Accessories: Inner & outer boxes, manual, booklet, Pictogram card, Master Chronometer card, removed links and warranty card (dated 2024)

Posted at

Jan 30, 2026, 10:57 AM

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Omega Speedmaster 38 Co-Axial Chronograph Grey Dial 324.32.38.50.06.001

Omega - 324.32.38.50.06.001 · $4,550

This Omega Speedmaster 38 Co-Axial Chronograph features a grey dial and is in excellent condition with minimal handling marks.

Condition: In very good condition, rated at 9.8/10
Box: Inner & Outer
Papers: Manual, Warranty Card (dated 2022), Pictogram Card

Posted at

Jan 30, 2026, 10:42 AM

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[WTS] Omega Speedmaster Moonwatch Sapphire Sandwich 1863 on Latest OEM Omega 3861 Bracelet with Quick Adjust Clasp + OEM Omega 3861 Moonwatch Box Set + Spiralwinder DON Ceramic Bezel - CLEAN, only $5400 shipped CONUS for everything

Omega Speedmaster Moonwatch Sapphire Sandwich 1863 on Latest OEM Omega 3861 Bracelet with Quick Adjust Clasp + OEM Omega 3861 Moonwatch Box Set + Spiralwinder DON Ceramic Bezel - CLEAN, only $5400 shipped CONUS for everything

Omega - 1863 · $5,400

This Omega Speedmaster Moonwatch Sapphire Sandwich is in fantastic condition and features a fully lumed ceramic bezel. It comes with an OEM Omega 3861 bracelet and box set.

Condition: Fantastic condition, some minor scratches on polished bits of case
Bracelet type: OEM Omega 3861
Bezel type: Fully lumed ceramic bezel, spiralwinder DON
Original bezel included: yes

Posted at

Jan 29, 2026, 7:03 PM

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