Omega Speedmaster Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Kanjar Oman

Reference 310.30.42.50.01.003

Omega Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Kanjar Oman

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] Omega Speedmaster “First Omega in Space” 39.7mm

Omega Speedmaster “First Omega in Space” 39.7mm

Omega - 310.32.40.50.06.001 · $6,700
This Omega Speedmaster "First Omega in Space" is a historically significant variant that pays tribute to the first Omega ever worn in space by astronaut Wally Schirra on October 3rd, 1962. The watch features a symmetrical design with straight lugs and a black aluminium bezel with a tachymeter scale.

  • Condition: Excellent
  • Case size: 39.7mm diameter
  • Movement type: Manually wound
  • Water resistance depth: 50m
Posted at
Apr 21, 2026, 10:25 PM
Active
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[WTS] 1995 Omega Speedmaster Date Mark 40 White Guilloche Dial 3513.33.00 | Great Condition (Serviced) | $2750

1995 Omega Speedmaster Date Mark 40 White Guilloche Dial 3513.33.00 | Great Condition (Serviced) | $2750

Omega - 3513.33.00 · $2,750
The Omega Speedmaster Date Mark 40 3513.33.00 is a mid-90s chronograph with a stainless steel case, black tachymeter bezel and white dial. It features the classic tri-compax layout, quickset date at 3, and is powered by the Omega Cal. 1152 based on the Valjoux 7750.

  • Condition: Great Condition (Serviced)
  • Case size: 39mm diameter
  • Lug width: 18mm
  • Thickness: 14mm
Posted at
Apr 21, 2026, 8:48 PM
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[WTS] Omega Speedmaster Sapphire Sandwich 310.30.42.50.01.002 Like New Unworn condition Full set 6500$ ♟️

Omega Speedmaster Sapphire Sandwich 310.30.42.50.01.002 Like New Unworn condition Full set 6500$ ♟️

Omega - Speedmaster Sapphire Sandwich 310.30.42.50.01.002 · $6,500
A Omega Speedmaster Sapphire Sandwich in excellent condition, with a rich history as the legendary moonwatch.

  • Condition: Like New Unworn
  • Shipping: available via Wire/paypal/Wise
  • Location: Miami Florida
Posted at
Apr 21, 2026, 5:10 PM
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[WTS][US] Omega Speedmaster First Omega in Space - FOiS - 310.30.40.50.06.001 - Full Set

[US] Omega Speedmaster First Omega in Space - FOiS - 310.30.40.50.06.001 - Full Set

Omega - 310.30.40.50.06.001 · $7,550
This Omega Speedmaster First Omega in Space is a fully functional watch that comes with a full set of accessories.

  • Condition: Fantastic condition with few hairlines on case, clasp, and bracelet
  • Case size: 40mm diameter
Posted at
Apr 21, 2026, 2:45 PM
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[WTS] Omega Speedmaster Grey Side of The Moon 311.93.44.51.99.002 Mint 2025

Omega Speedmaster Grey Side of The Moon 311.93.44.51.99.002 Mint 2025

Omega - 311.93.44.51.99.002 · $7,995
This Omega Speedmaster Grey Side of The Moon is for sale in a very mint condition with no flaws and comes as a fully complete set.

  • Condition: Mint condition
  • Warranty Card Date: April 2025
  • Shipping Method: WW insured shipping
Posted at
Apr 21, 2026, 12:44 PM
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[WTS] Omega Speedmaster '57 - current gen - warranty till Apr 2027 (price reduced)

Omega Speedmaster '57 - current gen - warranty till Apr 2027 (price reduced)

Omega - 332.10.41.51.01.001 · $5,799
Up for sale is my April 29, 2022 dated Omega Speedmaster '57, current generation, with warranty till Apr 2027.

  • Condition: Pre-owned, very good condition with minor scratches and marks
  • Dimensions: 40mm diameter
  • Bracelet length: 17cm
Posted at
Apr 21, 2026, 9:31 AM
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[WTS] Omega Speedmaster Professional Moonwatch ST 145.022-69 (1972)

Omega Speedmaster Professional Moonwatch ST 145.022-69 (1972)

Omega - ST 145.022-69 · $5,000
A 1972 Omega Speedmaster Professional Moonwatch with a manual wind Cal. 861 movement, 42mm stainless steel case, and black dial with three registers.

  • Condition: some scratches on the bezel and crystal, some marks on the case
  • Movement: Cal. 861
  • Case size: 42mm diameter
  • Water resistance: 30m depth rating
Posted at
Apr 21, 2026, 12:22 AM
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[WTS]🐼NEW 2026 OMEGA SPEEDMASTER REVERSE PANDA

🐼NEW 2026 OMEGA SPEEDMASTER REVERSE PANDA

Omega - Speedmaster
No description provided.

  • Condition: new
  • Year: 2026
Posted at
Apr 20, 2026, 11:39 PM
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[WTS] Omega Speedmaster Pro “Moon to Mars” Edition

Omega Speedmaster Pro “Moon to Mars” Edition

Omega - 3577.50 · $6,500
The Omega Speedmaster Pro 'Moon to Mars' Edition features a beautiful dial with subdials painted as Earth, Moon and Mars.

  • Condition: Good, with a scratch on the crystal at 1 o'clock
  • Bracelet size: 7 inches
  • Movement: 1861 manual
  • Size: 42mm diameter
Posted at
Apr 20, 2026, 10:37 PM
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