Omega Speedmaster Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Bracelet

Reference 310.30.42.50.01.001

Omega Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Bracelet

About this watch

The Omega Speedmaster Professional Moonwatch 3861 is a masterpiece that combines timeless elegance with modern technology. Founded in 1848, Omega has been a pillar in the world of horology, synonymous with precision and innovation. From its stunning design to its robust functionality, it encapsulates the spirit of adventure and precision that Omega is known for. The Speedmaster line has always been a favorite, and the 3861 model is no exception. With a diameter of 42 mm, the stainless steel case provides both durability and a polished aesthetic. The tachymeter bezel allows for speed calculations over a known distance, making it not just a pretty face but a functional tool. At the heart of the Speedmaster Professional Moonwatch is the Omega Caliber 3861, a hand-wound movement that's a modern upgrade from previous models, incorporating a co-axial escapement and a silicon balance spring. The craftsmanship is evident in the intricate details of the movement, which you can admire through the closed case back.
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MSRP: $7,000
Market Price: $5,141

Key Features

  • Stainless steel case with black matte finish
  • 42 mm diameter for a refined yet statement-making size
  • Plexi glass for added durability and shock resistance
  • Master Chronometer certification by METAS for accuracy and reliability
  • Hand-wound Omega Caliber 3861 movement with co-axial escapement and silicon balance spring
  • Chronograph function with small seconds, hours, and minutes
  • Water resistance of 50 meters for everyday wear

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Bracelet
Reference
310.30.42.50.01.001
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 3310.10 Vintage 18K Yellow Gold with Steel ($2200)

Omega Speedmaster 3310.10 Vintage 18K Yellow Gold with Steel ($2200)

Omega - 3310.10 · $2,200
This Omega Speedmaster features a 39mm case, an upgraded dial with white and gold accents, and is running within +10 seconds per day. It has been authenticated by eBay and comes with an authentication card.

  • Condition: Pre-owned with wear
  • Case size: 39mm diameter
  • Serial number date: 1989
Posted at
May 11, 2026, 11:58 AM
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[WTS] Omega Speedmaster Apollo 17 45th Anniversary 311.30.42.30.03.001 $6,900

Omega Speedmaster Apollo 17 45th Anniversary 311.30.42.30.03.001 $6,900

Omega - 311.30.42.30.03.001 · $6,900
This Omega Speedmaster Apollo 17 is a commemorative edition of the iconic watch, featuring a unique design and excellent condition.

  • Condition: Excellent, freshly polished
  • Length: 18.5cm bracelet length
  • Shipping: 4-5 business days to US
Posted at
May 11, 2026, 8:55 AM
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[WTS][US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

[US] Omega Speedmaster Moonwatch Professional - Reverse Panda - 42mm - 310.30.42.50.01.004 - Full Set - BRAND NEW

Omega - 310.30.42.50.01.004 · $10,700
A brand new Omega Speedmaster Moonwatch Professional in reverse panda style with a 42mm case size.

  • Condition: Brand new, unworn, and pristine
  • Case Size: 42mm
  • Box And Papers: true
Posted at
May 11, 2026, 7:48 AM
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[WTS] Omega Speedmaster Reduced 3510.21 Limited Edition (2,000 Pcs) Marui 39mm , B&P - $5,350

Omega Speedmaster Reduced 3510.21 Limited Edition (2,000 Pcs) Marui 39mm , B&P - $5,350

Omega - 3510.21 Marui · $5,350
Up for sale is my Omega Speedmaster 3510.21, a limited edition watch with an automatic movement and 39mm case.

  • Condition: Very good condition (8.9/10)
  • Movement type: Automatic
  • Case size: 39mm
  • Bracelet type: Original Omega Steel
Posted at
May 10, 2026, 9:10 PM
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[WTS] Omega Speedmaster Moonwatch Professional 3861 Sapphire 310.32.42.50.01.002 – Full Set – $6,500

Omega Speedmaster Moonwatch Professional 3861 Sapphire 310.32.42.50.01.002 – Full Set – $6,500

Omega - 3861 Sapphire 310.32.42.50.01.002 · $6,500
This Omega Speedmaster Moonwatch Professional Sapphire Sandwich features a 42mm stainless steel case and the 3861 Omega Master Chronometer movement.

  • Case Size: 42mm diameter
  • Material: stainless steel
  • Movement: Omega Master Chronometer
Posted at
May 10, 2026, 6:36 PM
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[WTS] Omega Speedmaster Moonphase 304.33.44.52.01.001

Omega Speedmaster Moonphase 304.33.44.52.01.001

Omega - 304.33.44.52.01.001 · $7,750
This Omega Speedmaster features a moonphase complication, automatic co-axial movement 9904, and comes with box, papers, and tag.

  • Condition: Good pre-owned condition
  • Size: 44.25mm diameter
  • Movement: Automatic
  • Strap: Omega leather strap
Posted at
May 10, 2026, 4:51 PM
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[WTS] PRICE DROP! Vintage Omega Speedmaster Teutonic Gray Dial Ref 145.0044 Rare German Market Outside-The-Box Speedy

PRICE DROP! Vintage Omega Speedmaster Teutonic Gray Dial Ref 145.0044 Rare German Market Outside-The-Box Speedy

Omega - 145.0044 · $2,750
A rare Omega Speedmaster Teutonic Gray Dial Ref 145.0044 made for the German market in the early 1980s. It has a bead-blasted case, integrated bracelet, and original tritium lume.

  • Condition: Pre-owned with wear, scratches, and nicks
  • Diameter: 42mm
  • Movement: Manual wound Omega cal 861
  • Bracelet size: up to app 7.25 inches
Posted at
May 10, 2026, 4:49 PM
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[WTS] Omega Speedmaster MK40 Schumacher Triple Date Chronogaph Day-Night( Serviced ) Price 3200$

Omega Speedmaster MK40 Schumacher Triple Date Chronogaph Day-Night( Serviced ) Price 3200$

Omega - 3520.53 · $3,200
The Omega Speedmaster MK40 Schumacher is a neo-classic Speedmaster model from the late 1990s/early 2000s, featuring a black dial with red accents and an automatic chronograph movement. It also includes a triple date and moon phase function, sapphire crystal, and original Omega bracelet.

  • Condition: Very good vintage condition
  • Case size: 39mm diameter
  • Movement: Cal. 1151 (based on Valjoux 7751)
  • Bracelet: Original Omega bracelet
Posted at
May 10, 2026, 12:16 PM
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[WTS] Omega Speedmaster Mark III 176.002 Blue Dial Orange Chrono Hand Mens Watch $2600

Omega Speedmaster Mark III 176.002 Blue Dial Orange Chrono Hand Mens Watch $2600

Omega - III 176.002 · $2,600
This Omega Speedmaster Mark III features a blue dial and orange chronograph hand, housed in a stainless steel case measuring 41mm in diameter.

  • Condition: Preowned, with some wear and marks
  • Model: Speedmaster Mark III
  • Movement: Automatic
  • Case material: Stainless steel
Posted at
May 10, 2026, 11:44 AM
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