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] OEM Authentic Omega Speedmaster 20mm Bracelet - $575 shipped CONUS

OEM Authentic Omega Speedmaster 20mm Bracelet - $575 shipped CONUS

A 41mm Omega Speedmaster in good condition, featuring a 20mm bracelet that should fit most Speedmasters with the same lug width.

  • Condition: Good condition with some desk dive rash
  • Bracelet code: 1620/887
  • Lug width: 20mm
Posted at
Dec 3, 2025, 7:56 PM
Active
[WTS] - Omega SpeedMaster Professional 3570.50 Matte Black Dial - $4,450

- Omega SpeedMaster Professional 3570.50 Matte Black Dial - $4,450

Omega - 3570.50 · $4,450
The Omega Speedmaster Professional features a 42mm stainless steel case with a matte black dial and a black bezel insert, powered by an unknown movement.

  • Condition: excellent
  • Case size: 42mm
  • Bracelet length: up to 7 inches / 17.8 cm
  • Bracelet material: stainless steel
Posted at
Dec 3, 2025, 6:01 PM
Active
[WTS] *FINAL Price Reduction* Omega Speedmaster Professional White Dial Full Set on Speedmaster '57 Flat Link Bracelet

*FINAL Price Reduction* Omega Speedmaster Professional White Dial Full Set on Speedmaster '57 Flat Link Bracelet

This Omega Speedmaster Professional features a white dial and is paired with a Speedmaster '57 flat link bracelet, which honors the original 1957 look.

  • Condition: Fairly new, beloved
  • Bracelet type: Speedmaster '57 flat link
  • Bracelet installation location: Omega Boutique at South Coast Plaza in Costa Mesa, CA
  • Bracelet date: 8/2025
Posted at
Dec 3, 2025, 5:16 PM
Active
[WTS] Omega Speedmaster Racing 32630405002001

Omega Speedmaster Racing 32630405002001

Omega - 32630405002001 · $2,900
This Omega Speedmaster Racing is in excellent working order and features a sleek design.

  • Condition: great condition
  • Shipping Methods: Zelle, PayPal, Venmo, or wire
  • Shipping Costs: additional $60 for insured overnight FedEx
Posted at
Dec 3, 2025, 4:10 PM
Active
[WTS] Omega Speedmaster 310.32.42.50.01.002

Omega Speedmaster 310.32.42.50.01.002

This Omega Speedmaster is from 2022 and runs well with everything in great shape.

  • Condition: Great condition
  • Year: 2022
  • Shipping cost: 60
Posted at
Dec 3, 2025, 3:52 PM
Active
[WTS] 2006 OMEGA SPEEDMASTER RACING 32630405002001

2006 OMEGA SPEEDMASTER RACING 32630405002001

Omega - 32630405002001 · $1,900
2006 OMEGA SPEEDMASTER RACING is being sold.

  • Payment Methods: Zelle, Venmo, PayPal, wire transfer
Posted at
Dec 3, 2025, 3:36 PM
Active
[WTS] Omega Speedmaster 38 Chronograph 324.30.38.50.02.001 $4,200

Omega Speedmaster 38 Chronograph 324.30.38.50.02.001 $4,200

For sale is my Omega Speedmaster 38mm chronograph in like new mint condition, complete with box and papers.

  • Condition: Like new, mint condition
  • Case Size: 38mm
Posted at
Dec 3, 2025, 2:31 PM
Active
[WTS] 2024 Omega Speedmaster - First Omega in Space - 310.30.40.50.06.001 - full kit - factory warranty - very good condition

2024 Omega Speedmaster - First Omega in Space - 310.30.40.50.06.001 - full kit - factory warranty - very good condition

A modern tribute to the first Omega worn beyond Earth's atmosphere, featuring a Master Chronometer-certified movement and unique hand designs.

  • Condition: Very good
  • Case Diameter: 39.7mm
  • Movement: Master Chronometer-certified 3861
Posted at
Dec 3, 2025, 1:58 PM
Active
[WTS] Omega Speedmaster Professional White Dial Ref: 310.32.42.50.04.001

Omega Speedmaster Professional White Dial Ref: 310.32.42.50.04.001

This Omega Speedmaster Professional Moonwatch features a white dial with red accents and is one of the seller's favorite takes on a classic.

  • Condition: New
  • Shipping: Free insured overnight shipping
  • Included items: Double boxed - inner and outer, 3 warranty cards, manual/booklet, travel case, pouch
  • Buyer perks: Open to trades, 3rd party escrow and authentication available, 12 month trade ins and buy backs, timegrapher testing
Posted at
Dec 3, 2025, 10:19 AM
Active