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 Professional Moonwatch 3570.50 with leather and stainless steel Omega bracelets - $3,950 Shipped

Omega - 3570.50 · $3,950

This is a re-listing of my Omega Speedmaster Professional Moonwatch, manufactured in 1992. The watch comes with the original steel bracelet, an adjustable leather bracelet, and a stainless steel buckle.

Condition: Excellent
Bracelet types: steel (original), leather (adjustable) with stainless steel buckle
Wrist size compatibility: 7.5 inches

Posted at

Dec 8, 2025, 2:31 PM

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

Omega - 3551.20.00 · $4,225

This Omega Speedmaster Broad Arrow is a 42mm watch in excellent mechanical condition, featuring a white dial.

Condition: Fantastic condition with minor hairlines
Case size: 42mm diameter

Posted at

Dec 8, 2025, 2:21 PM

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Omega Speedmaster Professional Hesalite - ref 310.30.42.50.01.001 - $5500 + label

Omega - 310.30.42.50.01.001 · $5,500

Omega Speedmaster Professional Hesalite with ref number 310.30.42.50.01.001 for sale.

Case size: 41mm

Posted at

Dec 8, 2025, 2:02 PM

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2024 Omega Speedmaster Professional “Sapphire Sandwich” – Full Set

Omega - 310.30.42.50.01.002 · $7,250

2024 Omega Speedmaster Professional Moonwatch “Sapphire Sandwich” with 42mm stainless steel case, sapphire front and exhibition caseback, black step dial, and manual winding Caliber 3861 Master Chronometer movement.

Condition: Excellent (9.5/10)
Case Size: 42mm diameter
Bracelet Condition: pristine, zero desk wear

Posted at

Dec 8, 2025, 12:44 PM

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Omega Speedmaster Silver Snoopy Award 310.32.42.50.02.001 w/ Bracelet x Full Set

Omega - 310.32.42.50.02.001 · $15,000

A 2023 Omega Speedmaster Silver Snoopy Award watch, part of the 50th Anniversary collection, featuring a complete set including bracelet and canvas bands.

Condition: Preowned with light wear (hairline scratches)
Bracelet Type: Fully linked
Canvas Band: yes

Posted at

Dec 8, 2025, 10:28 AM

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

Omega - 145.022-69 · $15,150

Very rare and fully original Omega Speedmaster Moonwatch 145.022-69 in beautiful condition, featuring a deep, even transformation with heavy yellow patina across all indices and matching hands.

Case Size: 42mm
Year Made: 1969
Movement Status: serviced in November 2025

Posted at

Dec 7, 2025, 6:21 PM

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Omega Speedmaster. 39mm. Triple Date. Clean.

Omega - Speedmaster (no specific reference number given) · $1,875

This Omega Speedmaster is a 39mm triple date model with clean condition.

Condition: Clean
Case Size: 39mm
Location: NJ USA

Posted at

Dec 7, 2025, 3:59 PM

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2021 Omega Speedmaster Professional

Omega - 310.30.42.50.01.002 · $6,000

A 2021 Omega Speedmaster Professional "Sapphire Sandwich" with a 42mm case size and manual winding movement.

Condition: Pre Owned/New: 9/10, Cosmetic Condition: Excellent
Movement: OMG Calibre 3861 (manual winding)
Power reserve: approximately 50 hours
Water resistance: 50 meters (165 feet)

Posted at

Dec 6, 2025, 7:29 PM

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[WTS] Omega Speedmaster 1957 / Broad Arrow Automatic Chrono 42mm Black Gloss Dial - Cal. 3313 High Horology Co Axial Column Wheel - Full Kit 09/2012 - $4,250 shipped CONUS

Omega Speedmaster 1957 / Broad Arrow Automatic Chrono 42mm Black Gloss Dial - Cal. 3313 High Horology Co Axial Column Wheel - Full Kit 09/2012 - $4,250 shipped CONUS

Omega - 1957 / Broad Arrow Automatic Chrono 42mm · $4,250

This Omega Speedmaster 1957 Broad Arrow chronograph is a full kit with warranty card dated September 2012. It features a high horology Frederic Piguet based movement with a column wheel and Co Axial escapement.

Condition: Excellent (minor wear on bezel and bracelet)
Movement: Omega Caliber 3313 (Frederic Piguet based) with Co Axial escapement and column wheel

Posted at

Dec 6, 2025, 3:49 PM

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