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

Current Listings

Omega Speedmaster Professional "Hesalite" 311.30.42.30.01.005 - $4500

Omega - 31130423001005 · $4,500

For sale is a beloved Omega Speedmaster Professional Hesalite Moonwatch with a discontinued model caliber 1861. It has never been polished or serviced and comes with inner, outer boxes, and all manuals.

Condition: Pre-owned with wear on the clasp
Caliber: Calibre 1861
Movement accuracy: +7s/d
Box set: Comes with inner and outer boxes, manuals

Posted at

May 22, 2026, 10:38 PM

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Memorial Day Weekend Sale – Omega Speedmaster Professional 3861 Sapphire (2022) – Full Set – Original Clasp + Micro-adjust Clasp – $6375 + shipping obo

Omega - 3861 Sapphire · $6,375

A classic Omega Speedmaster Professional Moonwatch from 2022, featuring a Co-Axial Master Chronometer movement and sapphire crystal front and back. It's in excellent condition, with clean crystal and a great-bracelet.

Condition: Excellent overall condition
Case size: 40mm diameter
Water resistance: 50m water resistant

Posted at

May 22, 2026, 10:36 PM

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Memorial Day Weekend Sale – Omega Speedmaster Reduced “Red Schumacher” 3510.61 – OG Bracelet – $2945 + shipping OBO

Omega - 3510.61 · $2,945

This Omega Speedmaster Reduced ‘Red Schumacher’ is a unique and collectible variant of the Speedmaster line, featuring a bright red dial, original bracelet, and late 90s / early 2000s Omega styling.

Condition: Very nice condition for its age with normal light wear consistent with use
Bracelet size: ~6.75 inch wrist diameter
Additional links included: 2
Movement type: Automatic chronograph

Posted at

May 22, 2026, 10:34 PM

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Omega Speedmaster Reduced 39mm 3510.50 | Watch and Undated Card

Omega - 3510.50 · $3,250

This Omega Speedmaster Reduced is a 39mm model featuring a service history unknown and 7 s/d 275 AMP. It comes with an undated card.

Condition: Good Pre-Owned with Marks on Hesalite
Service History: Unknown
Bezel Type: Hesalite

Posted at

May 22, 2026, 9:38 PM

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Omega Speedmaster Professional Moonwatch 42MM White Dial Full Set

Omega - 310.32.42.50.04.002 · $7,700

This Omega Speedmaster Professional Moonwatch features a 42mm steel case, paired with a black aluminum bezel and a skeletonized case back. The crisp white dial showcases luminous hands and three chronograph subdials.

Case size: 42mm
Bezel material: black aluminum
Bezel features: luminous tachymeter scale

Posted at

May 22, 2026, 9:34 PM

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Omega Speedmaster 38MM Cappuccino Dial 18k Sedna Gold Full Set

Omega - 324.23.38.50.02.002 · $6,000

A 2023 Omega Speedmaster with a 38mm case size, suitable for both men and women, featuring an 18K Sedna Gold case and Cappuccino Dial.

Condition: Great condition
Case Size: 38mm
Material: 18K Sedna Gold
Band Material: Taupe-brown leather

Posted at

May 22, 2026, 9:19 PM

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Labor Day Weekend Sale – Omega Speedmaster Reduced “Red Schumacher” 3510.61 – OG Bracelet – $2945 + shipping OBO

Omega - 3510.61 · $2,945

Condition: Very nice condition for its age with normal light wear consistent with use
Bracelet Fits Wrist Size: ~6.75 inch wrist depending on preferred fit
Bezel Error: 0.1 ms
Amplitude: 275-299

Posted at

May 22, 2026, 8:30 PM

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Labor Day Weekend Sale – Omega Speedmaster Professional 3861 Sapphire (2022) – Full Set – Original Clasp + Micro-adjust Clasp – $6375 + shipping obo

Omega - 3861 Sapphire · $6,375

A classic Omega Speedmaster Professional Moonwatch in excellent condition, featuring a sapphire crystal front and back, Co-Axial Master Chronometer movement, and original and upgraded bracelet clasps.

Condition: Excellent overall condition, very light wear from normal use
Box And Papers: full set
Bracelet Length: full links plus additional uncle Seiko 1.5 links
Clasp Type: original clasp + micro-adjust clasp

Posted at

May 22, 2026, 8:25 PM

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