Omega Speedmaster Speedmaster Professional Moonwatch 3861 Stainless Steel - Sedna Gold / Pink / Alligator

Reference 310.23.42.50.99.001

About this watch

The Omega Speedmaster Professional Moonwatch 3861 is a masterpiece of horology that seamlessly blends heritage, luxury, and modern technology. Its stunning pink sunburst dial radiates warmth and elegance, while the Sedna gold accents harmonize beautifully with the stainless steel case. The chronograph function is easily accessible, making it practical for everyday use. At its heart beats the Omega Caliber 3861 movement, featuring a co-axial escapement and silicon balance spring. This timepiece is not just a watch; it's a statement of sophistication and style that pairs well with both formal and casual attire.
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Key Features

  • Omega Caliber 3861 movement
  • Sedna gold accents
  • Stainless steel case
  • Tachymeter bezel
  • Water resistance up to 50 meters
  • 42mm diameter
  • Co-axial escapement and silicon balance spring

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch 3861 Stainless Steel - Sedna Gold / Pink / Alligator
Reference
310.23.42.50.99.001
Movement
3861
Movement Features
  • Small Seconds, Hours, Minutes
  • Chronograph
  • Chronometer
Case
42mm
Dial Color
Pink
Crystal
Sapphire
Water Resistance
50

Current Listings

[WTS] Omega "Silver Snoopy" Speedmaster 2025

Omega "Silver Snoopy" Speedmaster 2025

Omega - 310.32.42.50.02.001 · $15,499
A coveted collector piece commemorating NASA's Silver Snoopy Award, featuring a highly detailed caseback animation of Snoopy in orbit.

  • Condition: Brand new, unworn
  • Case size: 42mm diameter
  • Case material: stainless steel
  • Dial color: silver with blue subdials
Posted at
Feb 5, 2026, 6:36 PM
Active
[WTS] Omega Speedmaster ’57 40.5mm Red Co-Axial Chronograph BOXES/PAPERS!

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A red dial Omega Speedmaster '57 chronograph, 40.5mm in size, powered by a manual movement.

  • Condition: pre-owned, nice condition with typical cosmetic wear throughout
  • Case Diameter: 40.5mm
  • Movement: manual
  • Water Proofness: 50 meters depth rating
Posted at
Feb 5, 2026, 3:20 PM
Active
OMEGA speedmaster marui limited model 3510.21.00 automatic [WTS]

OMEGA speedmaster marui limited model 3510.21.00 automatic

The watch being listed is an Omega Speedmaster Marui Limited Model 3510.21.00 automatic.

Posted at
Feb 5, 2026, 2:38 PM
Active
[WTS] Omega Speedmaster Reference 311.30.42.30.01.005

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This Omega Speedmaster professional is a beautiful watch from 2019, complete with everything and in perfect condition.

  • Condition: perfect
  • Movement: manual winding
  • Size: 42mm diameter
  • Year: 2019
Posted at
Feb 5, 2026, 1:37 PM
Active
[WTS] Omega Speedmaster 3520.53 Box, Manual, Card - $2,850 - Reserved post for u/subengineer

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Omega - 3520.53 · $2,850
A Omega Speedmaster 3520.53 Full Kit is being sold in good condition with an automatic movement and a steel case.

  • Condition: Good condition with some usage marks and minimal oxidation
  • Case Size: 39mm diameter
  • Water Resistance: Not specified
  • Movement Type: Automatic
Posted at
Feb 5, 2026, 4:18 AM
Active
[WTS] Omega Speedmaster Professional Moonwatch Steel Step Dial Yellow Patina 1969 (Serviced)

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Omega - 145.022-69 · $4,995
This Omega Speedmaster Moonwatch ref. 145.022-69 is presented in all-original configuration and features a step dial with pronounced patina across all indices.

  • Condition: Very nice overall condition, with honest wear consistent with age
  • Size: 42mm diameter
  • Year: 1969
  • Movement Status: Professionally serviced in January 2026
Posted at
Feb 4, 2026, 10:26 PM
Active
[wts] 2024 OMEGA SPEEDMASTER WHITE DIAL
310.30.42.50.04.001 $7399

2024 OMEGA SPEEDMASTER WHITE DIAL 310.30.42.50.04.001 $7399

This is a 2024 OMEGA SPEEDMASTER with a white dial and various features such as a stainless steel case, sapphire crystal, and a 50-hour power reserve.

  • Condition: Pre Owned, Cosmetic Condition: 9/10
  • Case Material: STAINLESS/SAPPHIRE
  • Water Resistance: 50 METERS/165 FEET
Posted at
Feb 4, 2026, 9:40 PM
Active
[WTS] Omega Speedmaster Reduced 39mm Serviced ⏱

Omega Speedmaster Reduced 39mm Serviced ⏱

This is a neo-vintage Omega Speedmaster Reduced, coming with an original Omega modern box set and manual. The watch features a 39mm case and has been accurately timekeeping after service.

  • Case Size: 39mm
  • Lug To Lug: 45mm
  • Lug Width: 18mm
Posted at
Feb 4, 2026, 9:18 PM
Active
[WTS] 2023 Omega Speedmaster Moonwatch 42mm Moonshine Gold Green 310.60.42.50.10.001 Full Set

2023 Omega Speedmaster Moonwatch 42mm Moonshine Gold Green 310.60.42.50.10.001 Full Set

Omega - 310.60.42.50.10.001 · $29,200
2023 Omega Speedmaster Moonwatch 42mm Moonshine Gold Green, a manual wind mechanical watch in very good condition.

  • Condition: Very nice preowned condition with some light scratches on the case and bracelet
  • Case Dimensions: 42mm diameter
  • Movement: Manual Wind, Mechanical
  • Original Purchase Date: September 2023
Posted at
Feb 4, 2026, 8:13 PM
Active