Omega Speedmaster Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Kanjar Oman

Reference 310.30.42.50.01.003

Omega Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Kanjar Oman

About this watch

The Omega Speedmaster Professional Moonwatch 3861 is a piece of history wrapped around your wrist, with its rich lineage and modern upgrades capturing the hearts of watch enthusiasts and collectors alike. This manual-winding chronograph movement features a co-axial escapement and silicon balance spring, making it resistant to magnetic fields up to 15,000 gauss. The plexi glass provides a warm, vintage feel that many collectors adore, while the stainless steel case measures 42mm in diameter and has a water resistance of 50 meters. This timepiece is perfect for everyday wear, suitable for both formal and casual occasions. With its stunning design, robust movement, and versatility, it's a celebration of heritage, precision, and style.

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Key Features

Omega Caliber 3861 Movement
Plexi Glass with Vintage Feel
42mm Stainless Steel Case
50m Water Resistance
Manual-Winding Chronograph Function
Co-Axial Escapement and Silicon Balance Spring

Specifications

Brand

Omega

Family

Speedmaster

Model

Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Kanjar Oman

Reference

310.30.42.50.01.003

Movement

3861

Movement Features

Small Seconds, Hours, Minutes
Chronograph
Chronometer

Case

Stainless Steel 42mm

Dial Color

Black

Crystal

Plexi

Water Resistance

Current Listings

Omega Speedmaster Date 3211.31 COMPLETE SET + OEM BRACELET

Omega - 3211.31 · $2,750

For sale is an Omega Speedmaster Date in amazing condition, complete set including warranty card and original speedmaster bracelet.

Condition: amazing condition with hardly any wear
Bracelet type: OEM
Payment methods accepted: crypto, cash, etc.
Location: southwest FL

Posted at

Apr 25, 2026, 12:19 PM

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2021 Omega Speedmaster Racing 329.32.44.51.01.001 Orange Full Set - $6,495

Omega - 329.32.44.51.01.001 · $6,495

A 2021 Omega Speedmaster Racing in excellent condition, featuring a racing design and available as a full set with various accessories.

Condition: Excellent condition with minimal signs of wear
Size: 40mm diameter
Year: 2021

Posted at

Apr 25, 2026, 9:40 AM

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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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