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.

Buy Now on Jomashop

This is an affiliate link

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

Current Listings

Omega OEM Integrated Speedmaster Rubber Straps - One with OEM Clasp - One Without Clasp (Backordered thru Omega)

Omega - 032Z017245 · $575

Additional details for Omega Speedmaster Professional rubber straps with curved ends and stainless steel deployant clasp. Designed to fit 20mm lugs.

Condition: Very Good
Material: rubber
Clasp Type: stainless steel deployant clasp
Lugs Size: 20mm

Posted at

Apr 24, 2026, 3:27 PM

Active

View listing on r/WatchExchange

2026 LNIB OMEGA Speedmaster Moonwatch Professional "Reverse Panda" 310.30.42.50.01.004 - Full Set

Omega - 310.30.42.50.01.004 · $10,350

The Omega Speedmaster Moonwatch Professional 'Reverse Panda' is a new addition to the permanent Moonwatch collection, featuring a glossy polished black lacquered step dial with white varnished and lacquered sub-dials.

Condition: Pristine pre-owned condition, virtually like new
Case size: 42mm diameter
Movement: Manual-Winding Co-Axial Master Chronometer Calibre 3861 (METAS certified)
Power reserve: ~50 hours

Posted at

Apr 24, 2026, 2:47 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Day Date 3523.80

Omega - 3523.80 · $2,350

This Omega Speedmaster Day Date features a beautiful blue dial and is in excellent condition with minimal signs of wear.

Condition: Excellent
Payment Methods Accepted: pretty much every payment method, including crypto
Meetup Location: southwest FL
Available Trades: Tudor, Cartier, Rolex, Omega, Breitling, AP

Posted at

Apr 24, 2026, 1:25 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Racing 326.30.40.50.03.001

Omega - 326.30.40.50.03.001 · $2,450

For sale is an Omega Speedmaster Racing, in great condition with some light wear around the watch.

Condition: great condition with some light wear
Payment Methods Accepted: pretty much every payment method including crypto
Local Meet Available: yes

Posted at

Apr 24, 2026, 1:20 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Date 38.5mm 3513.54

Omega - 3513.54 · $1,575

For sale is an Omega Speedmaster Date 38.5mm reference number 3513.54, in good condition, from 1998.

Condition: good with some wear and small marks
Year of production: 1998
Case size: 38.5mm

Posted at

Apr 24, 2026, 1:15 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Reduced 3510.50

Omega - 3510.50 · $2,475

For sale is an Omega Speedmaster Reduced 3510.50 in great condition, with some minor wear and fading on the bezel.

Condition: Great condition with some light wear and fading on the bezel
Payment Methods Accepted: Various payment methods including crypto with a small fee, excluding PayPal
Local Pickup Available: Yes, located in southwest FL
Trading Possible: Yes, only with brands Tudor, Cartier, Rolex, Omega, Breitling, AP

Posted at

Apr 24, 2026, 1:00 PM

Active

View listing on r/WatchExchange

2026 Omega Speedmaster Professional White Dial 310.32.42.50.04.002 Full Set $7,300

Omega - 310.32.42.50.04.002 · $7,300

A modern Omega Speedmaster Professional with a lacquered white dial, powered by the Co-Axial Master Chronometer Calibre 3861, featuring a clean and high-contrast look while maintaining the iconic Speedmaster design.

Condition: Like new
Case size: 42mm diameter
Case material: Stainless steel
Movement: Manual wind (Omega Calibre 3861 Master Chronometer)

Posted at

Apr 24, 2026, 12:48 PM

Active

View listing on r/WatchExchange

Omega Speedmaster ‘57 reference 331.12.42.51.01.001 - Complete set with hang tag, undated

Omega - 331.12.42.51.01.001

For sale is an Omega Speedmaster '57 reference 331.12.42.51.01.001, complete set with hang tag and undated.

Condition: undated
Diameter: 42mm

Posted at

Apr 24, 2026, 11:48 AM

Active

View listing on r/WatchExchange

2025 Omega Speedmaster Racing 329.32.44.51.06.001 44MM Full Set

Omega - 329.32.44.51.06.001 · $6,450

This is a 2025 Omega Speedmaster Racing Chronograph with a silver/grey dial and a 44mm case size. It comes as a full set with box, papers, and warranty coverage through January 2030.

Condition: Excellent
Case Size: 44mm diameter
Box And Papers: true

Posted at

Apr 24, 2026, 10:26 AM

Active

View listing on r/WatchExchange