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 Reduced 39mm - 3510.50

Omega - 3510.50 · $2,495

A Omega Speedmaster Reduced in 39mm size, running strong with a small issue with the chronograph function.

Condition: pre-owned, good condition
Size: 39mm diameter
Wrist size: not specified

Posted at

May 8, 2026, 1:02 PM

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Omega Speedmaster Day Date 3523.80

Omega - 3523.80 · $2,225

This Omega Speedmaster Day Date features a beautiful blue dial and is in excellent condition.

Condition: Excellent
Payment Methods Accepted: Cryptocurrency and other methods (except PayPal)
Location: Southwest FL
Local Meeting Available: Yes

Posted at

May 8, 2026, 12:50 PM

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Omega Speedmaster Date 3511.50

Omega - 3511.50 · $1,975

This Omega Speedmaster date is a rare reverse panda dial model only sold in Japan.

Condition: great condition
Location: southwest FL
Payment Methods Accepted: crypto with small fee, local meetups
Payment Methods Not Accepted: PayPal

Posted at

May 8, 2026, 12:19 PM

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“May the 4th Be With You” 2026 Card Omega Speedmaster Sapphire Complete Set $7,200 + label

Omega - 310.30.42.50.01.002 · $7,200

A brand new Omega Speedmaster Sapphire Sandwich Complete Set with all cards included, travel case, and literature.

Condition: Brand new, unworn and unsized
Year: 5/4/2026
Contents: All cards included, travel case and Speedmaster literature
Payment methods: Zelle or Wire preferred, Credit Cards accepted +3.5%

Posted at

May 8, 2026, 11:23 AM

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2026 Omega Speedmaster White Full Set

Omega - Speedmaster

No description provided in the listing

Posted at

May 8, 2026, 10:13 AM

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[US] Omega Speedmaster Calibre 321 - Ed White - Black Dial - 39.7mm - 311.30.40.30.01.001 - Full Set

Omega - 311.30.40.30.01.001 · $15,550

Up for sale is an Omega Speedmaster Calibre 321 - Ed White - Black Dial - 39.7mm, functions perfectly mechanically.

Condition: pristine condition with minor hairlines on clasp, case, and bracelet
Diameter: 39.7mm

Posted at

May 8, 2026, 8:05 AM

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Omega Speedmaster Hesilate Ref. 310.32.42.50.01.001 Full Set + Original Receipt

Omega - 310.32.42.50.01.001 · $4,999

This Omega Speedmaster Moonwatch Professional features a Co-Axial Master Chronometer Caliber 3861 and is in excellent overall condition, with the notable exception of a very minor mark on the Hesalite crystal.

Condition: Excellent overall condition with minor mark on Hesalite crystal and light signs of normal wear on case
Movement: Co-Axial Master Chronometer Caliber 3861
Crystal type: Hesalite
Caseback type: Aftermarket exhibition caseback (original solid also included)

Posted at

May 8, 2026, 8:00 AM

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[US] Omega Speedmaster Moonwatch Professional - White Dial - 310.30.42.50.04.001 - Full Set

Omega - 310.30.42.50.04.001 · $7,925

Up for sale is an Omega Speedmaster Moonwatch Professional - White Dial - Full Set Watch is in pristine condition and functions perfectly mechanically, without issue.

Condition: pristine condition with minor hairlines on clasp, case, and bracelet
Water Resistance: 30m
Box Contents: inner box, outer box, removable travel case, historical booklet, user manual, microfiber cloth, master chronometer card, warranty card

Posted at

May 8, 2026, 7:59 AM

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Omega Speedmaster Professional (310.30.42.50.01.002)

Omega - 310.30.42.50.01.002 · $6,800

This Omega Speedmaster Professional features a black dial on a stainless steel bracelet, with a sapphire crystal and manual caliber 3861 movement.

Condition: Excellent
Case size: 42mm diameter
Case material: Stainless Steel
Bracelet material: Stainless Steel

Posted at

May 8, 2026, 7:11 AM

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