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

Reference 310.30.42.50.01.003

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 3590.50

Omega Speedmaster 3590.50

  • Title: [WTS] Omega Speedmaster 3590.50
Posted at
Oct 17, 2025, 5:28 PM
Active
[WTS] Omega 1861 Speedmaster Bracelet and Forstner Flatlink Contemporary

Omega 1861 Speedmaster Bracelet and Forstner Flatlink Contemporary

A Omega 1861 Speedmaster, sold with a Forstner bracelet and an additional Forstner Flatlink Contemporary. The first has some wear on the clasp and links, while the second is in excellent condition.

  • Condition: Forstner bracelet (worn) - Speedmaster bracelet (excellent)
  • Shipping Cost Uk: 10
  • Shipping Cost International: 25
Posted at
Oct 17, 2025, 4:05 PM
Active
[WTS] New & Unworn 2025 Omega Speedmaster Professional Moonwatch ‘Silver Snoopy Award’ 50th 310.32.42.50.02.001 Complete

New & Unworn 2025 Omega Speedmaster Professional Moonwatch ‘Silver Snoopy Award’ 50th 310.32.42.50.02.001 Complete

Omega - 310.32.42.50.02.001 · $15,950
The Omega Speedmaster Professional Moonwatch 'Silver Snoopy Award' is a limited edition watch celebrating the 50th anniversary of Omega's recognition from NASA astronauts for its role in the Apollo 13 mission. It features an animated caseback with a mesmerizing display of Snoopy piloting his Command and Service Module in lunar orbit.

  • Condition: Brand New
  • Year: 2025
  • Contents: Complete Collector Set with all the goodies
Posted at
Oct 17, 2025, 12:00 PM
Active
[WTS] 2024 Omega Speedmaster Professional Moonwatch Sapphire 310.30.42.50.01.002 Full Set

2024 Omega Speedmaster Professional Moonwatch Sapphire 310.30.42.50.01.002 Full Set

2024 Omega Speedmaster Professional Moonwatch with stainless steel case, black bezel, and black dial.

  • Condition: Very nice preowned condition
  • Case material: stainless steel
  • Case dimensions: 42mm diameter
  • Bezel material: stainless steel
Posted at
Oct 16, 2025, 10:02 PM
Active
[WTS] Omega Speedmaster “Triple Date” 3521.30.00 – Fully Overhauled by Omega Service Center (Jan 2025) – $2,200 OBO Shipped (CONUS)

Omega Speedmaster “Triple Date” 3521.30.00 – Fully Overhauled by Omega Service Center (Jan 2025) – $2,200 OBO Shipped (CONUS)

Omega - 3521.30.00 · $2,200
  • Condition: Excellent post-service condition - running perfectly
  • Case diameter: 39mm
  • Lug width: 18mm
  • Crystal material: Sapphire
Posted at
Oct 16, 2025, 6:54 PM
Active
[WTS] Omega Speedmaster BRAND NEW $4,749

Omega Speedmaster BRAND NEW $4,749

Omega - Speedmaster · $4,749
Brand new Omega Speedmaster for sale.

  • Condition: brand new
Posted at
Oct 16, 2025, 3:32 PM
Active
[WTS] Omega Speedmaster Schumacher Legend 3506.31

Omega Speedmaster Schumacher Legend 3506.31

Omega - 3506.31 · $3,999
A Omega Speedmaster Schumacher Legend in a Panda dial configuration, featuring a 42mm case.

  • Case size: 42mm
Posted at
Oct 16, 2025, 11:58 AM
Active
[WTS] Omega Speedmaster Professional Hesalite with Case & Cards (Canada)

Omega Speedmaster Professional Hesalite with Case & Cards (Canada)

This Omega Speedmaster Professional Hesalite is a rare variant of the iconic watch, featuring a Hesalite crystal and spiral winders.

  • Condition: Excellent
  • Case: Spiral winders sapphire crystal open case back
Posted at
Oct 16, 2025, 9:56 AM
Active
[WTS] Omega Speedmaster Moonwatch Professional Moonshine Gold 42mm Complete Set 310.62.42.50.99.001

Omega Speedmaster Moonwatch Professional Moonshine Gold 42mm Complete Set 310.62.42.50.99.001

Omega - 310.62.42.50.99.001 · $23,895
A work of art from every angle, the Omega Speedmaster Moonwatch is anti-magnetic with a co-axial escapement, making it perfect for daily wear.

  • Condition: Excellent
  • Case size: 42mm diameter
  • Movement caliber: Omega 3861
  • Power reserve: 50 hours
Posted at
Oct 16, 2025, 8:32 AM
Active