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

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Feb 5, 2026, 3:20 PM

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Posted at

Feb 5, 2026, 1:37 PM

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Condition: Good condition with some usage marks and minimal oxidation
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Posted at

Feb 5, 2026, 4:18 AM

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Condition: Very nice overall condition, with honest wear consistent with age
Size: 42mm diameter
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Posted at

Feb 4, 2026, 10:26 PM

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This is a 2024 OMEGA SPEEDMASTER with a white dial and various features such as a stainless steel case, sapphire crystal, and a 50-hour power reserve.

Condition: Pre Owned, Cosmetic Condition: 9/10
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Water Resistance: 50 METERS/165 FEET

Posted at

Feb 4, 2026, 9:40 PM

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Lug To Lug: 45mm
Lug Width: 18mm

Posted at

Feb 4, 2026, 9:18 PM

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Omega - 310.60.42.50.10.001 · $29,200

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Condition: Very nice preowned condition with some light scratches on the case and bracelet
Case Dimensions: 42mm diameter
Movement: Manual Wind, Mechanical
Original Purchase Date: September 2023

Posted at

Feb 4, 2026, 8:13 PM

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