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

November 2025 Omega Speedmaster Sapphire Complete Set $7,200 + label

Omega - 310.30.42.50.01.002 · $7,200

The watch is a November 2025 Omega Speedmaster Sapphire Complete Set with micro-adjust clasp, featuring all cards included, travel case, and Speedmaster literature.

Condition: Brand new, fully stickered and unworn
Year: November 2025
Micro-adjust clasp: available
State: Louisiana

Posted at

Dec 2, 2025, 11:11 AM

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Omega Speedmaster Professional “Tokyo 2020 Yellow” – Ref. 522.20.42.30.01.001 – Complete Set – $6500

Omega - 522.20.42.30.01.001 · $6,500

This Omega Speedmaster Professional features a 42mm stainless steel case with yellow gold accents and black dial with gold subdials, powered by the classic hand-wound Caliber 1861 movement. It comes with various accessories as part of its complete set.

Condition: Very good pre-owned
Case diameter: 42mm
Bracelet type: stainless steel
Movement: hand-wound Caliber 1861

Posted at

Dec 1, 2025, 8:50 PM

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Omega OEM Speedmaster Moonwatch Professional Black Fabric Strap & Omega OEM Deployant Clasp

Omega - 032CWZ014117, 94521613 · $475

This Omega Speedmaster Moonwatch Professional features a black fabric strap, stainless steel deployant clasp, and comes with original packaging.

Condition: As New
Strap material: black fabric
Clasp type: Omega OEM Stainless Steel Deployant/16mm
Lug width: 20mm

Posted at

Dec 1, 2025, 5:05 PM

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Omega 20mm OEM Integrated Speedmaster Moonwatch Professional Black Rubber Strap (Sold Out) & Omega OEM Deployant Clasp

Omega - 032Z017245 · $575

A black rubber strap for the Omega Speedmaster Professional, featuring curved ends and a 20mm width. It is no longer available at Omega AD or online.

Strap Ref: 032Z017245 (Black Rubber, curved ends, 20mm/16mm)
Clasp Ref: 94521633 (Omega OEM Stainless Steel Deployant/16mm)
Fitment: Speedmaster Professional (20mm lug)

Posted at

Dec 1, 2025, 4:48 PM

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[US] Omega Speedmaster Broad Arrow - White Dial - 42mm - 3551.20.00 - Full Set

Omega - 3551.20.00 · $4,250

This Omega Speedmaster Broad Arrow features a white dial, 42mm case size, and comes as a full set including the watch, box, both manual, and triple cards.

Condition: Fantastic condition with only minor hairlines
Case diameter: 42mm
Bracelet condition: minor hairlines

Posted at

Dec 1, 2025, 8:25 AM

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2025 OMEGA SPEEDMASTER WHITE DIAL, LIKE NEW FULL SET $7,350 USD + shipping

OMEGA - 2025 · $7,350

The Omega Speedmaster White Dial 2025 features a clean white dial, sapphire crystal, and classic stainless steel case and bracelet.

Condition: Like new
Year: 2025
Case material: stainless steel
Bracelet material: stainless steel

Posted at

Nov 30, 2025, 6:11 PM

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Omega Speedmaster Professional Moonwatch Tropical Brown Dial Heavy Patina Blue Insert 1969 (Serviced) 🟤

Omega - 145.022-69 · $15,150

This is a 1969 Omega Speedmaster Moonwatch with a tropical brown dial featuring a deep, even transformation with heavy yellow patina across all indices and matching hands. The watch has been professionally serviced and runs properly.

Condition: Beautiful condition
Size: 42mm diameter
Year: 1969
Case back: Flat case back

Posted at

Nov 30, 2025, 4:23 PM

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1991 Omega Speedmaster Moonwatch Ref 3590.50 with abstract

Omega - 3590.50 · $4,199

This is a 1991 Omega Speedmaster Moonwatch with a caliber 861 movement and excellent tritium dial. The watch appears to be in great condition with original hands and an original Omega hesalite crystal.

Condition: Excellent vintage condition
Movement: Caliber 861
Serial number: 482774XX
Bracelet size: adjusts to fit up to 7.5 inch wrist

Posted at

Nov 30, 2025, 3:32 PM

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Omega Speedmaster Professional Moonwatch 310.30.42.50.01.001 – Unworn, FULL SET – $5,900 (Shipped CONUS)

Omega - 310.30.42.50.01.001 · $5,900

This is an Omega Speedmaster Professional Moonwatch with a manual-wind Master Chronometer movement and legendary 'Moonwatch' design in a 42mm stainless steel case.

Condition: Unworn, excellent condition
Movement type: Manual-wind
Case material: 42mm stainless steel
Bracelet included: Yes, original bracelet with all links

Posted at

Nov 30, 2025, 3:21 PM

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