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.

Buy Now on Jomashop

This is an affiliate link

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

Omega Speedmaster Professional Rubber Strap + Clasp

Omega · $499

Additional Details: Like new, pristine. For the Moonwatch works on older Moonwatch models as well.

Condition: like new
Lug Width: 20mm
Clasp Width: 16mm

Posted at

Dec 23, 2025, 12:15 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Reduced Ref. 3510.50.00 (Watch Only, Excellent Condition) $2450

Omega - 3510.50.00 · $2,450

A 28-year-old Omega Speedmaster Reduced in near-new condition, featuring a 39mm case and automatic movement.

Condition: Excellent, verging on like-new condition
Age: approximately 28 years old
Case size: 39mm diameter
Bracelet length: 22 total links

Posted at

Dec 23, 2025, 11:42 AM

Active

View listing on r/WatchExchange

Omega Speedmaster Saphire full set 2021

Omega - Speedmaster Professional 'Saphire Sandwich' Edition · $4,500

The Omega Speedmaster Professional 'Saphire Sandwich' Edition features the 3861 Movement, and comes with its original box, papers, and warranty card.

Condition: Excellent
Movement: 3861

Posted at

Dec 23, 2025, 11:06 AM

Active

View listing on r/WatchExchange

Omega Speedmaster 3520.53 Box & Card - $2,900

Omega - 3520.53 · $2,900

A 39mm Omega Speedmaster 3520.53 in great condition, featuring an automatic movement and a steel case on an original Omega Steel bracelet.

Condition: 8.8/10 great condition with some usage marks and micro scratches on the blue AR coating
Case size: 39mm diameter
Movement type: automatic
Bracelet length: fits up to 7 inch wrists

Posted at

Dec 22, 2025, 9:30 PM

Active

View listing on r/WatchExchange