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] 2019 Omega Speedmaster Grey Side of the Moon Meteorite - Full set Box and papers - Ref# 311.63.44.51.99.001

2019 Omega Speedmaster Grey Side of the Moon Meteorite - Full set Box and papers - Ref# 311.63.44.51.99.001

This Omega Speedmaster Grey Side of the Moon Meteorite features a 44mm ceramic case and Sedna gold details, making it stand out among other speedies.

  • Condition: Very good condition, small nick on the case
  • Case diameter: 44mm
  • Water resistance: 30m
Posted at
Apr 29, 2025, 10:35 PM
Active
[WTS] Omega Speedmaster 50th Anniversary Silver Snoopy Award 310.32.42.50.02.001

Omega Speedmaster 50th Anniversary Silver Snoopy Award 310.32.42.50.02.001

Omega - 310.32.42.50.02.001 · $14,000
This Omega Speedmaster commemorates the Apollo 13 mission and features a stunning design blending history and horology.

  • Condition: Excellent pre-owned
  • Case Size: 42mm diameter
  • Case Material: Stainless Steel
  • Strap: Blue coated nylon fabric strap with folding clasp
Posted at
Apr 29, 2025, 10:32 PM
Active
[WTS] Omega Speedmaster ref. 3520.50 Automatic Triple Date

Omega Speedmaster ref. 3520.50 Automatic Triple Date

Omega - 3520.50 · $2,550
A 39mm automatic Omega Speedmaster with triple date complication, featuring a healthy timegrapher data and functioning chronograph.

  • Condition: Minimal signs of wear, honest wear throughout
  • Size: 39mm diameter
  • Bracelet size: Full-sized
  • Box papers: No box or papers included
Posted at
Apr 29, 2025, 9:37 PM
Active
[WTS] Omega Speedmaster Triple Date 3521.30

Omega Speedmaster Triple Date 3521.30

Omega - 3521.30 · $1,700
A beautiful white Omega Speedmaster Triple Date with a 3 date complication showing the day, date, and month.

  • Condition: Very good condition, with some normal wear on the case bezel and bracelet
  • Size: 39mm diameter
  • Movement: 1150
  • Accessories: N/A
Posted at
Apr 29, 2025, 9:34 PM
Active
[WTS] Omega Seamaster NTTD on NATO | Omega Speedmaster Moonphase | Tudor Black Bay 58 Burgundy Dial

Omega Seamaster NTTD on NATO | Omega Speedmaster Moonphase | Tudor Black Bay 58 Burgundy Dial

This Omega Speedmaster Moonphase is a high-end watch with a 44.25mm case size, features a moon phase display, and comes with an additional OEM leather strap.

  • Condition: Very Good
  • Strap: additional OEM leather strap
  • Box And Papers: yes
  • Case Size: 44.25mm
Posted at
Apr 29, 2025, 9:26 PM
Active
[WTS] 4️⃣4️⃣0️⃣0️⃣Omega Speedmaster Moonwatch

4️⃣4️⃣0️⃣0️⃣Omega Speedmaster Moonwatch

Omega - 311.304.230.01005 · $4,400
2017 Omega Speedmaster Moonwatch with Haselite crystal and Sapphire crystal exhibition back cover, comes with original caseback, bracelet, and warranty card.

  • Bracelet material: Brushed steel
  • Crystal type: Haselite
Posted at
Apr 29, 2025, 7:08 PM
Active
OMEGA Speedmaster Day‑Date 3523.30.00 | Double Boxed + Pictogram Card

OMEGA Speedmaster Day‑Date 3523.30.00 | Double Boxed + Pictogram Card

OMEGA - 3523.30.00 · $2,450.002
The OMEGA Speedmaster Day-Date 3523.30.00 is a luxury watch featuring a clean crystal and dial, with some minor imperfections on the case and bracelet. The movement is strong but running slightly slow.

  • Condition: Preowned with small dings and scratches in case and bracelet, movement running slightly slow
  • Bracelet size: 7.5in (fits larger side)
  • Movement condition: running slowly, could be regulated by watchmaker
  • Case/bracelet condition: small dings and scratches, light and easily polishable
Posted at
Apr 29, 2025, 6:50 PM
Active
Omega Speedmaster - Dark Side of the Moon - 311.92.44.51.01.007 ( new / 2024 )

Omega Speedmaster - Dark Side of the Moon - 311.92.44.51.01.007 ( new / 2024 )

Omega - 311.92.44.51.01.007 · $9,795.01
This Omega Speedmaster Moonwatch Dark Side of the Moon features a Titanium Deployment Clasp and Ceramic Black Case with a 44.25mm diameter.

  • Condition: Brand New
  • Case material: Ceramic, Titanium
  • Movement: Omega Co-Axial Calibre 9300
Posted at
Apr 29, 2025, 3:55 PM
Active
Omega Speedmaster - FOIS - 310.30.40.50.06.001 ( excellent / 2024 )

Omega Speedmaster - FOIS - 310.30.40.50.06.001 ( excellent / 2024 )

Omega - 310.30.40.50.06.001 · $7,450.007
This is an excellent condition Omega Speedmaster FOIS 39.7mm Stainless Steel Case with the Omega 3861 Calibre, a First Omega in Space model.

  • Condition: Excellent condition
  • Case size: 39.7mm diameter
  • Caliber: Omega 3861
Posted at
Apr 29, 2025, 3:54 PM
Active