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

Omega Speedmaster Grey Side of the Moon 311.93.44.51.99.001 Full Set $7,200

Omega - 311.93.44.51.99.001 · $7,200

A modern and highly distinctive take on the Speedmaster line featuring a full grey ceramic case and matching dial.

Condition: Excellent (pre-owned, minimal wear)
Case Size: 44.25mm diameter
Case Material: Grey ceramic
Movement: Automatic chronograph (Omega Co-Axial Calibre 9300)

Posted at

Apr 25, 2026, 9:37 AM

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Omega Speedmaster Professional White, 2024 $7k

Omega - 310.30.42.50.04.001 · $7,000

This Omega Speedmaster Professional White is a pre-owned watch with a reference number of 310.30.42.50.04.001, featuring a white color scheme.

Condition: Preowned
Shipping Cost: $150 (USA shipping)
Payment Methods: Wire or Credit Card (+4.9% & 4 days clearance)
Warranty Type: 2024 Warranty

Posted at

Apr 25, 2026, 8:52 AM

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(Rare) (Serviced) Omega Speedmaster Reduced Mother of Pearl Dial Watch 39mm 3534.71 $2,400

Omega - 3534.71 · $2,400

This Omega Speedmaster Reduced features a mother of pearl dial and is 39mm in size.

Condition: Light scratches from normal use, recently serviced
Case Size: 39mm

Posted at

Apr 25, 2026, 8:35 AM

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Omega Speedmaster Moonwatch 310.30.42.50.04.001 Box and Papers, 2024, $7500

Omega - 310.30.42.50.04.001 · $7,500

The Omega Speedmaster Moonwatch features a 42mm diameter, 50m water resistance, and 50 hour power reserve with chronograph functionality.

Condition: Dial and crystal are clean, Case and caseback are clean, Bracelet is excellent but clasp has hairline scratches
Water Resistance: 50m depth rating
Case Size: 42mm diameter
Power Reserve: 50 hours

Posted at

Apr 24, 2026, 11:24 PM

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Omega speedmaster reduced

Omega - 3510.50 · $2,500

Up for sale is my Omega Speedmaster Reduced from the mid 1990s, which comes in a stainless steel case with a black dial and automatic chronograph.

Condition: Great condition for its age, with patina
Case size: 39mm
Bracelet type: Stainless steel and Uncle's flat link bracelet
Bracelet material: Stainless steel

Posted at

Apr 24, 2026, 10:59 PM

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OMEGA Speedmaster "Dark Side of the Moon" Apollo 8 Ref. 311.92.44.30.01.001 + Apollo 8 Gen2 Strap + Deployant Clasp - ULTIMATE SET! 🔥$10,000🔥

OMEGA - 311.92.44.30.01.001 · $10,000

The OMEGA Speedmaster 'Dark Side of the Moon' Apollo 8 watch commemorates the 50th anniversary of the Apollo 8 mission, featuring a black ceramic case and a skeletonized dial with a lunar surface design.

Condition: UNWORN
Case material: black ceramic
Case diameter: 44.25mm

Posted at

Apr 24, 2026, 6:21 PM

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BNIB Omega Speedmaster Professional 310.30.42.50.01.001 $6,799

Omega - 310.30.42.50.01.001 · $6,799

The Omega Speedmaster Moonwatch Professional features a 42mm stainless steel case with a hesalite front and solid case back, powered by the updated caliber 3861 movement.

Condition: Brand new in box with warranty
Movement: Hand wound Cal 3861
Power reserve: 50 hours
Case size: 42mm diameter

Posted at

Apr 24, 2026, 5:59 PM

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