Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

Reference 310.55.42.50.13.001

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet is a masterpiece of horology, blending art, history, and cutting-edge technology. Crafted from Sedna Gold, this watch boasts a unique color that's both warm and striking. Its round shape and sunburst brown finish give it a luxurious feel, while the diamond-set bezel adds a touch of elegance. The 3861 is equipped with a chronograph feature, allowing you to measure elapsed time with precision. At its heart lies the Omega caliber 3861, an updated version of the legendary caliber 861/1861, featuring a co-axial escapement and silicon balance spring for accuracy and reliability. Master Chronometer certified by METAS, this watch has undergone rigorous testing to withstand magnetic fields of up to 15,000 gauss. Its sleek design and exceptional craftsmanship make it a standout in any collection. Whether you're at a formal event or a casual outing, this watch is sure to turn heads.

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Key Features

Sedna Gold case
Manual-winding chronograph movement
Co-axial escapement and silicon balance spring
Master Chronometer certified by METAS
Diamond-set bezel
Water resistance up to 50 meters
42.00 mm diameter and 13.18 mm height

Specifications

Brand

Omega

Family

Speedmaster

Model

Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

Reference

310.55.42.50.13.001

Movement

3861

Movement Features

Small Seconds, Hours, Minutes
Chronograph
Chronometer

Case

Sedna Gold 42mm

Dial Color

Brown

Crystal

Sapphire

Water Resistance

Current Listings

[US] Omega Speedmaster Silver Snoopy - 50th Anniversary - 310.32.42.50.02.001 - Full Set - BRAND NEW

Omega - 310.32.42.50.02.001 · $14,750

This Omega Speedmaster Silver Snoopy is a limited edition 50th anniversary watch that comes in its full set with box, manuals, and other accessories.

Condition: Brand new, pristine and unworn
Case size: 42mm diameter
Water resistance: 30m water resistant

Posted at

Dec 3, 2025, 8:38 AM

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[US] Omega Speedmaster Chronoscope - White Panda Dial - 43mm - 329.30.43.51.02.002

Omega - 329.30.43.51.02.002 · $5,175

A white panda dial Omega Speedmaster Chronoscope in 43mm size, with minor hairlines on the clasp and bracelet.

Condition: Fantastic
Diameter: 43mm

Posted at

Dec 3, 2025, 8:26 AM

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Omega Speedmaster Professional Moonwatch - 311.30.42.30.01.005 - Big Box - Great Condition

Omega - 311.30.42.30.01.005 · $4,750

A highly sought after Omega Speedmaster Professional Moonwatch 'Big Box' collector's set purchased in 2017, showing great pre-owned condition.

Condition: great pre-owned condition, some normal wear on the stainless steel strap and minor marks on hesalite crystal
Case diameter: 42mm
Band material: stainless steel

Posted at

Dec 2, 2025, 10:48 PM

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Omega Speedmaster Professional Moonwatch – Ref. 145.0022 / 345.0022 – Hesalite – Circa 2005 – Very Clean

Omega - 145.0022 / 345.0022 · $4,000

This is a full-size 42mm manual-wind Moonwatch in very clean pre-owned condition with Hesalite crystal and strong movement.

Condition: Very clean pre-owned condition
Movement Type: Manual wind - Caliber 1861
Crystal Material: Hesalite
Bracelet Type: Stainless steel

Posted at

Dec 2, 2025, 6:16 PM

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OMEGA Speedmaster Hesalite 3861 May 2023 - $5600

OMEGA - 3861 · $5,600

This Omega Speedmaster Professional, also known as The Moonwatch, features a Hesalite crystal and is from May 2023. It comes with its original box, papers, and manual in excellent condition.

Condition: Excellent
Year Of Manufacture: 2023
Crystal Material: Hesalite
Bracelet Adjustment: micro adjust

Posted at

Dec 2, 2025, 2:58 PM

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November 2025 Omega Speedmaster Sapphire Complete Set $7,200 + label

Omega - 310.30.42.50.01.002 · $7,200

The watch is a November 2025 Omega Speedmaster Sapphire Complete Set with micro-adjust clasp, featuring all cards included, travel case, and Speedmaster literature.

Condition: Brand new, fully stickered and unworn
Year: November 2025
Micro-adjust clasp: available
State: Louisiana

Posted at

Dec 2, 2025, 11:11 AM

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Omega Speedmaster Professional “Tokyo 2020 Yellow” – Ref. 522.20.42.30.01.001 – Complete Set – $6500

Omega - 522.20.42.30.01.001 · $6,500

This Omega Speedmaster Professional features a 42mm stainless steel case with yellow gold accents and black dial with gold subdials, powered by the classic hand-wound Caliber 1861 movement. It comes with various accessories as part of its complete set.

Condition: Very good pre-owned
Case diameter: 42mm
Bracelet type: stainless steel
Movement: hand-wound Caliber 1861

Posted at

Dec 1, 2025, 8:50 PM

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