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

Reference 310.30.42.50.01.001

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] 2021 Omega Speedmaster Professional Moonwatch Sapphire Sandwich $5,999

2021 Omega Speedmaster Professional Moonwatch Sapphire Sandwich $5,999

The Omega Speedmaster Moonwatch Professional sapphire sandwich version features a robust and elegant 42mm stainless steel case, updated Caliber 3861 movement, and superior magnetic resistance.

  • Condition: Excellent time keeping with no significant gain or loss
  • Case size: 42mm diameter
  • Case thickness: 13.2mm
  • Lug width: 20mm
Posted at
Jan 15, 2026, 12:27 PM
Active
[WTS] Omega Speedmaster Professional Full Kit with Extras (reposted and reduced)

Omega Speedmaster Professional Full Kit with Extras (reposted and reduced)

Omega - 3861 · $5,600
an Omega Speedmaster Professional Moonwatch with Cal. 3861 movement and Hesalite crystal, purchased from an Authorized Dealer.

  • Condition: Daily wear, shows normal wear/use
  • Movement: Cal. 3861 (Master Chronometer)
  • Bracelet type: Current bracelet with tool-less sliding clasp adjustment
Posted at
Jan 15, 2026, 10:55 AM
Active
[WTS] Omega Speedmaster Reduced 3523.80.00 – Blue Dial – Full Set + Serialized Tag – Mint – $3,500

Omega Speedmaster Reduced 3523.80.00 – Blue Dial – Full Set + Serialized Tag – Mint – $3,500

Omega - 3523.80.00 · $3,500
This Omega Speedmaster Reduced features a unique blue dial, classic proportions and wearability, making it an excellent alternative for collectors who want something rarer than the standard black-dial Reduced.

  • Condition: Mint
  • Movement: Automatic chronograph
  • Case size: 39mm diameter
  • Dial color: Blue
Posted at
Jan 15, 2026, 10:34 AM
Active
[WTS] 2023 Omega Speedmaster Calibre 321 “Ed White” 311.30.40.30.01.001 — Excellent Condition, Box & Papers

2023 Omega Speedmaster Calibre 321 “Ed White” 311.30.40.30.01.001 — Excellent Condition, Box & Papers

Omega - 311.30.40.30.01.001 · $75,000
This is a 2023 Omega Speedmaster Calibre 321 'Ed White' edition. It features a silver dial with a distinctive design.

  • Condition: Excellent Condition
  • Year: 2023
  • Movement: Calibre 321
Posted at
Jan 15, 2026, 8:21 AM
Active
[WTS] 2024 Omega Speedmaster “First Omega in Space”  310.30.40.50.06.001 – Full Set – $6,450 Shipped

2024 Omega Speedmaster “First Omega in Space” 310.30.40.50.06.001 – Full Set – $6,450 Shipped

A modern reissue of the Speedmaster worn by Wally Schirra during the Sigma 7 mission, featuring a slim 39.7mm case with Master Chronometer technology.

  • Condition: Excellent
  • Case Size: 39.7mm
  • Water Resistance: 50m
  • Movement: Manual-wind chronograph (Omega Caliber 3861, Master Chronometer)
Posted at
Jan 14, 2026, 3:28 PM
Active
[WTS] OMEGA Speedmaster Professional - Sapphire Sandwhich ( White Dial ) 310.30.42.50.04.001 $7,700 plus label

OMEGA Speedmaster Professional - Sapphire Sandwhich ( White Dial ) 310.30.42.50.04.001 $7,700 plus label

Speedmaster Professional with a White Dial and Sapphire Sandwhich case.

Posted at
Jan 14, 2026, 2:09 PM
Active
[WTS] Omega Speedmaster professional Oem rubber strap & deployant $525 shipped

Omega Speedmaster professional Oem rubber strap & deployant $525 shipped

This Omega Speedmaster professional watch is being sold to make room for the sale of a rubber strap and deployant, which are also included.

  • Condition: Good
  • Strap type: Rubber strap
  • Deployment buckle type: Deployant
Posted at
Jan 14, 2026, 1:38 PM
Active
[WTS] 2023 Omega Speedmaster Moonphase 44.25mm 304.33.44.52.03.001 Blue Dial - Box and Papers

2023 Omega Speedmaster Moonphase 44.25mm 304.33.44.52.03.001 Blue Dial - Box and Papers

This 2023 Omega Speedmaster Moonphase features a 44.25mm blue dial and is in good condition with light signs of wear on the case and clasp.

  • Condition: Good preowned condition
  • Case Size: 44.25mm diameter
  • Warranty: 5 year warranty remaining
Posted at
Jan 14, 2026, 10:53 AM
Active
[WTS] 1989 Omega Speedmaster Automatic 175.0032. Vintage Speedy | Runs well

1989 Omega Speedmaster Automatic 175.0032. Vintage Speedy | Runs well

Omega - 175.0032 · $2,700
A vintage Omega Speedmaster Automatic from 1989, featuring incredible tritium lume patina and a few variations in caseback and bracelet.

  • Condition: Excellent, with honest but light wear
  • Caseback variations: multiple caseback designs available for this reference
  • Bracelet variations: multiple bracelet options available for this reference
Posted at
Jan 14, 2026, 9:56 AM
Active