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 Mother Of Pearl Dial 3834.72.35 - Original Buckle & Handmade Strap (Serviced) only for 2200$ 🚢

Omega Speedmaster Mother Of Pearl Dial 3834.72.35 - Original Buckle & Handmade Strap (Serviced) only for 2200$ 🚢

Omega - 3834.72.35 · $2,200
A stainless steel Omega Speedmaster with a 39mm case size and mother of pearl dial featuring green Arabic numerals. The watch has been recently serviced and is working perfectly fine.

  • Condition: Clean case, super clean dial and bezel
  • Case Size: 39mm diameter
  • Movement Type: Automatic
Posted at
Oct 19, 2025, 9:41 AM
Active
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[WTS] Omega Speedmaster BSOM Moonphase 304.93.44.52.03.002 (2021) | Complete Box & Papers | $10,999 Shipped

Omega Speedmaster BSOM Moonphase 304.93.44.52.03.002 (2021) | Complete Box & Papers | $10,999 Shipped

Omega - 304.93.44.52.03.002 · $10,999
The Omega Speedmaster “Blue Side of the Moon” (2021) is a stunning and underrated modern Speedmaster variant, crafted entirely from blue ceramic with a rich blue dial and Sedna gold accents.

  • Condition: amazing condition overall
  • Year: 2021
  • Material: blue ceramic
  • Movement: running strong and keeps excellent time
Posted at
Oct 18, 2025, 10:41 PM
Active
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[WTS] Omega Speedmaster Moonphase

Omega Speedmaster Moonphase

Omega - 3575.20 · $5,250
Up for sale is an Omega Speedmaster Moonphase ref. 3575.20, which runs great and comes with full kit and documentation.

  • Condition: excellent
  • Warranty card included: true
  • Shipping limited to conus: true
Posted at
Oct 18, 2025, 10:24 PM
Active
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[WTS] Omega Speedmaster 3861 Bracelet (W/Quickadjust Clasp) ~5 weeks old, Like New

Omega Speedmaster 3861 Bracelet (W/Quickadjust Clasp) ~5 weeks old, Like New

Omega - 3861 · $720
A brand new Omega Speedmaster bracelet, sold as the seller upgraded to an original bracelet.

  • Condition: Like New
  • Age: ~5 weeks old
Posted at
Oct 18, 2025, 5:07 PM
Active
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[WTS] Omega Speedmaster Professional Moonwatch 310.30.42.50.01.002 – Full Kit – Excellent Condition – $5,900

Omega Speedmaster Professional Moonwatch 310.30.42.50.01.002 – Full Kit – Excellent Condition – $5,900

Omega - 310.30.42.50.01.002 · $5,900
This Omega Speedmaster Professional Moonwatch is a highly sought-after model, known for its robust design and iconic status.

  • Condition: Excellent Condition
  • Movement: Automatic movement
Posted at
Oct 18, 2025, 10:53 AM
Active
View listing on r/WatchExchange
[wts] Omega Speedmaster racing 9900 44.25mm 329.33.44.51.01.001 under warranty

Omega Speedmaster racing 9900 44.25mm 329.33.44.51.01.001 under warranty

Omega - 329.33.44.51.01.001 · $5,800
This is a Omega Speedmaster racing watch, model 9900, featuring a 44.25mm case size and a factory warranty until OCT 2024.

  • Condition: Good condition
  • Case size: 44.25mm
  • Warranty: Factory warranty until OCT 2024
Posted at
Oct 17, 2025, 9:19 PM
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[WTS] Pristine Omega Speedmaster Sapphire Sandwich - Full Set!

Pristine Omega Speedmaster Sapphire Sandwich - Full Set!

Omega - 310.30.42.50.01.002 · $6,499
A timeless and instantly recognizable watch, meticulously cared for by the seller over two years.

  • Condition: Pristine
  • Worn: 10-12 times over two years
  • Crystal condition: Perfect
  • Bezel condition: Perfect
Posted at
Oct 17, 2025, 8:27 PM
Active
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[WTS] Omega Speedmaster 3590.50

Omega Speedmaster 3590.50

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

Omega 1861 Speedmaster Bracelet and Forstner Flatlink Contemporary

Omega - 1861 Speedmaster Bracelet and Forstner Flatlink Contemporary · $480
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
View listing on r/WatchExchange