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] 2024 Omega Speedmaster Moonphase - Box and Papers

2024 Omega Speedmaster Moonphase - Box and Papers

Omega - 304.33.44.52.03.001 · $6,950
2024 Omega Speedmaster Moonphase with blue sun-brushed dial and ceramic bezel, powered by OMG 9904 movement.

  • Condition: Really nice used condition with a few very light marks
  • Case size: 44.25mm
  • Movement power reserve: 60 hours
Posted at
Dec 6, 2025, 9:33 AM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster Dark Side of the Moon 311.92.44.30.01.001 | Ceramic |FULL SET

Omega Speedmaster Dark Side of the Moon 311.92.44.30.01.001 | Ceramic |FULL SET

Omega - 311.92.44.30.01.001 · $7,850
This Omega Speedmaster Dark Side of the Moon features a full-ceramic case and buckle, sold with its box and papers.

  • Condition: Mint, like-new condition
  • Case material: full-ceramic
  • Year: 2019
Posted at
Dec 5, 2025, 9:10 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster “The 1957 Trilogy” 60th Anniversary Limited Edition 311.10.39.30.01.001 - With accessories

Omega Speedmaster “The 1957 Trilogy” 60th Anniversary Limited Edition 311.10.39.30.01.001 - With accessories

Omega - 311.10.39.30.01.001 · $6,899
This listing features the Omega Speedmaster “The 1957 Trilogy” 60th Anniversary Limited Edition, a commemorative watch marking the brand’s iconic design.

  • Condition: Excellent pre-owned
  • Accessories: booklets, straps, strap changer, travel case, tag, Double box
  • Condition Detail: Undated card
Posted at
Dec 5, 2025, 7:02 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster w/ white gloss lacquer dial [ Ref. 310.30.42.50.04.001 ]

Omega Speedmaster w/ white gloss lacquer dial [ Ref. 310.30.42.50.04.001 ]

Omega - 310.30.42.50.04.001 · $7,500
Up for sale is an Omega Speedmaster Moonwatch Professional with a white gloss lacquer dial, coming as a full set including box and warranty card.

  • Condition: excellent condition
  • Case size: 42mm diameter
Posted at
Dec 5, 2025, 6:44 PM
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[WTS] Omega Speedmaster Moonwatch Professional White Dial 310.30.42.50.04.001

Omega Speedmaster Moonwatch Professional White Dial 310.30.42.50.04.001

Omega - 310.30.42.50.04.001 · $7,975
The Omega Speedmaster Moonwatch Professional White Dial features a bold, high-contrast aesthetic and is available as a full set.

  • Condition: Mint
  • Water Resistance: meters
  • Set Contents: full
Posted at
Dec 5, 2025, 3:16 PM
Active
View listing on r/WatchExchange
[WTS] Omega Speedmaster 3590.50

Omega Speedmaster 3590.50

Omega - 3590.50
Posted at
Dec 5, 2025, 2:53 PM
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[WTS] Omega Speedmaster Moonwatch Professional 42mm White Dial 310.30.42.50.04.001 Complete

Omega Speedmaster Moonwatch Professional 42mm White Dial 310.30.42.50.04.001 Complete

Omega - 310.30.42.50.04.001 · $7,650
A Omega Speedmaster Moonwatch Professional with a 42mm white dial.

  • Condition: In very good condition, rated at 9.7/10
  • Box And Papers: true
  • Year Of Manufacture: 2024
Posted at
Dec 5, 2025, 10:31 AM
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[WTS] Omega Speedmaster “Ed White” Cal. 321 Tropical Dial Heavy Patina (Serviced)

Omega Speedmaster “Ed White” Cal. 321 Tropical Dial Heavy Patina (Serviced)

Omega - 105.003-65 · $10,995
This Omega Speedmaster Ed White Ref. 105.003-65 is a historic and collectible variant with a stunning brown tropical dial, developed rich patina over time. It has a stainless steel case in strong proportions and matching tritium hands intact under UV light.

  • Condition: Very good condition
  • Size: 39mm
  • Year: 1965
  • Movement serviced: July 2023
Posted at
Dec 5, 2025, 9:35 AM
Active
View listing on r/WatchExchange

2022 Omega Speedmaster Moonwatch Sapphire 42mm 310.30.42.50.01.002 Mint Complete

Omega - 310.30.42.50.01.002 · $6,195
This 2022 Omega Speedmaster Moonwatch Sapphire 42mm is a first watch worn on the moon, featuring photos and a video on the seller's website.

  • Condition: Minty fresh
  • Case size: 42mm
  • Year: 2022
  • Contents: watch,inner & outer boxes,warranty card,pictogram,master chronometer,instruction booklet,black travel case,hang tag,cleaning cloth,Moonwatch Booklet
Posted at
Apr 7, 2025, 2:59 PM
Active
View listing on RolexForums