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
50

Current Listings

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

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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[WTS] 1991 Omega Speedmaster Moonwatch Ref 3590.50 with abstract

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

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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[WTS] Omega Speedmaster First Omega in Space (FOIS) Numbered Edition

Omega Speedmaster First Omega in Space (FOIS) Numbered Edition

Omega - 311.32.40.30.01.001 · $4,600
This Omega Speedmaster First Omega in Space has been modified to resemble the Ed White Speedmaster and comes with all original parts for easy conversion. It's a numbered edition from 2020, featuring a genuine Omega 321 handset, Broad Arrow dial, and spiral winder sapphire case back.

  • Condition: Very good condition, with minimal signs of wear.
  • Handset type: Genuine Omega 321
  • Dial type: Genuine Omega 'Broad Arrow'
  • Case back material: Sapphire
Posted at
Nov 30, 2025, 2:25 PM
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[WTS] Forstner Model O for Omega Speedmaster Professional- $100 Shipped

Forstner Model O for Omega Speedmaster Professional- $100 Shipped

· $100
A 20mm Forstner Model O bracelet is available for the Omega Speedmaster. It features excellent build quality and a great taper from 20 mm to 16 mm at the clasp, with a spring-link providing comfortable wrist expansion.

  • Compatible models: 1861 and earlier
  • Dimensions: 20mm diameter (clasp 16mm)
  • Taper: from 20 mm to 16 mm at the clasp
Posted at
Nov 30, 2025, 2:04 PM
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[WTS] 2014 Omega Speedmaster 57 w/Cards (no box)

2014 Omega Speedmaster 57 w/Cards (no box)

Omega - Speedmaster 57 · $3,950
A 2014 Omega Speedmaster 57 with a 41.5mm automatic movement and column wheel vertical clutch.

  • Movement: caliber 9300
  • Strap type: NATO
Posted at
Nov 30, 2025, 12:38 PM
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[WTS] Omega Speedmaster. 39mm. Automatic.

Omega Speedmaster. 39mm. Automatic.

Omega - Speedmaster · $1,575
A 39mm automatic Omega Speedmaster with strong lume, being sold by the seller.

  • Case Size: 39mm diameter
  • Movement Type: Automatic
Posted at
Nov 30, 2025, 12:20 PM
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[WTS] Omega Moon Landing 50th Anniversary – Apollo Astronaut Gold Figure USB + Speedmaster Pin (Netherlands)

Omega Moon Landing 50th Anniversary – Apollo Astronaut Gold Figure USB + Speedmaster Pin (Netherlands)

Omega · $2,500
The Omega Moon Landing 50th Anniversary collection includes a rare astronaut gold figure USB and a Speedmaster pin, given out during Omega's promotions for the anniversary.

  • Condition: Excellent condition
  • Country of origin: Netherlands
  • Eu/international shipping: true
Posted at
Nov 30, 2025, 11:03 AM
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[WTS] Omega Speedmaster Pin Set – 50th Anniversary – Complete Set – Amsterdam (NL)

Omega Speedmaster Pin Set – 50th Anniversary – Complete Set – Amsterdam (NL)

Posted at
Nov 30, 2025, 9:08 AM
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