Omega Speedmaster Speedmaster Professional Moonwatch

Reference 3870.50.31

About this watch

The Omega Speedmaster Professional Moonwatch (model 3870.50.31) is a masterpiece of watchmaking. This iconic timepiece has been to the moon and back, thanks to its association with the Apollo 11 mission in 1969. At its heart lies the Omega caliber 1861, a hand-wound movement that's both reliable and precise. With a frequency of 21,600 vibrations per hour and a power reserve of 48 hours, this watch is designed to keep you on time for your next adventure. The black dial is elegantly accented by stick and dot indexes, making it both readable and stylish. Its stainless steel case with a round shape and diameter of 42.00 mm exudes sophistication, while the tachymetric bezel adds a sporty edge. Whether you're in a boardroom or at a casual gathering, this watch makes a statement. The Speedmaster's versatility is unmatched, effortlessly transitioning from a dress watch to a casual piece. Pair it with a crisp suit or a relaxed T-shirt, and it fits right in. Its durability and accuracy have made it the perfect companion for astronauts, and its rich heritage is a testament to Omega's engineering prowess.

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MSRP: $4,400

Market Price: $4,139

Key Features

Omega caliber 1861 hand-wound movement
50-meter water resistance
42mm stainless steel case with black dial
Tachymetric bezel
Chronograph functionality with small seconds, hours, and minutes hands

Specifications

Brand

Omega

Family

Speedmaster

Model

Speedmaster Professional Moonwatch

Reference

3870.50.31

Movement

1861

Movement Features

Small Seconds, Hours, Minutes
Chronograph

Case

Stainless Steel 42mm

Dial Color

Black

Crystal

Plexi

Water Resistance

Current Listings

1991 Omega Speedmaster Moonwatch Ref 3590.50 with abstract

Omega - 3590.50 · $4,000

This 1991 Omega Speedmaster Moonwatch is in excellent condition with an original tritium dial and hands, and a correct Omega hesalite crystal.

Condition: Excellent vintage condition, unpolished
Serial number: 482774XX
Movement: caliber 861
Bracelet size: 1479/812, currently sized for a 6.8" wrist

Posted at

Jan 9, 2026, 5:57 PM

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Omega Speedmaster Reduced — $2500 USD

Omega - 3510.50 · $2,500

For sale is my Omega Speedmaster Reduced with a 39mm case size and automatic movement.

Condition: Excellent
Case Size: 39mm
Movement Type: Automatic

Posted at

Jan 9, 2026, 5:55 PM

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Omega Speedmaster Reduced, ref. 175.0032.1, Factory Service Papers, Box, Accessories

Omega - 175.0032.1 · $2,700

The Omega Speedmaster Reduced is a beautiful watch in excellent condition, with factory service papers and box included.

Condition: Excellent
Service cost: $850
Year of service: 2019

Posted at

Jan 9, 2026, 5:34 PM

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Omega Speedmaster Moonphase BOX AND PAPERS 304.33.44.52.03.001

Omega - 304.33.44.52.03.001 · $6,850

For sale is an Omega Speedmaster Moonphase, this watch features a black leather strap with quick release function and comes double boxed with cards including warranty card.

Condition: Excellent condition with minimal wear on the straps
Straps: black leather omega strap with quick release function
Payment Methods Accepted: all payment methods except PayPal, crypto with small fee
Trading Brands: Tudor, Cartier, Rolex, Omega, Breitling, AP

Posted at

Jan 9, 2026, 4:52 PM

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Omega Speedmaster Sapphire Sandwich

Omega - 31030425001002 · $6,000

A Omega Speedmaster Sapphire Sandwich, a manual winding watch featuring an original box and papers. The watch has a 42mm size.

Year: 2025
Size: 42mm diameter
Bracelet condition: barely used

Posted at

Jan 9, 2026, 4:22 PM

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OMEGA SPEEDMASTER PROFESSIONAL [WHITE][EXCELLENT CONDITION AND BARELY WORN] $7,700 OBO

OMEGA - SPEEDMASTER PROFESSIONAL · $7,700

A well-maintained Omega Speedmaster Professional in excellent condition, barely worn.

Condition: EXCELLENT CONDITION AND BARELY WORN
Payment methods: PayPal, Zelle, Venmo

Posted at

Jan 9, 2026, 4:13 PM

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1979 Omega Speedmaster Professional Moon Watch

Omega - Speedmaster Professional Moon Watch with manual wind calibre 861 · $4,000

This 1979 Omega Speedmaster Professional Moon Watch is in excellent condition, featuring its original comfort stretch 1039 bracelet and a manual wind calibre 861 movement. The watch has aged nicely, with great lume and dial details.

Condition: Excellent with fine scratches, one visible dent in the bracelet and inconsistent timegraph results
Bracelet type: Comfort stretch 1039
Case size: 42mm diameter
Crown size: 43.2mm

Posted at

Jan 8, 2026, 2:55 PM

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Omega Speedmaster Professional Moonwatch Full Steel 145.022-69 Ghost Bezel Yellow Patina Step Dial 1969 (Serviced) 🔥

Omega - 145.022-69 · $5,425

This Omega Speedmaster Moonwatch presents beautifully in full steel, with a strong and sharp case and original step dial displaying warm yellow patina.

Condition: serviced, excellent definition
Size: 42mm diameter
Year: 1969
Movement service date: November 2022

Posted at

Jan 8, 2026, 2:54 PM

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Omega Speedmaster Date 32105000 Full Set 3000USD

Omega - 32105000 · $3,000

A 2009 Omega Speedmaster Date 40mm watch that has been worn only a handful of times. It comes with the box and papers, one additional link, and is in great condition.

Condition: Overall great condition, a couple of light scratches on the side of the bezel and some scuffs on the band and bottom of the case.
Length: 7.5"
Purchase Year: 2023
Service History: Not serviced since purchase

Posted at

Jan 8, 2026, 1:08 PM

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