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

Omega Speedmaster BSOM Moonphase 304.93.44.52.03.002 (2021) | Complete Box & Papers | $10,999 Shipped

Omega - 304.93.44.52.03.002 · $10,999

The Omega Speedmaster “Blue Side of the Moon” (2021) is a stunning and underrated modern Speedmaster variant, crafted entirely from blue ceramic with a rich blue dial and Sedna gold accents.

Condition: amazing condition overall
Year: 2021
Material: blue ceramic
Movement: running strong and keeps excellent time

Posted at

Oct 18, 2025, 10:41 PM

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Omega Speedmaster Moonphase

Omega - 3575.20 · $5,250

Up for sale is an Omega Speedmaster Moonphase ref. 3575.20, which runs great and comes with full kit and documentation.

Condition: excellent
Warranty card included: true
Shipping limited to conus: true

Posted at

Oct 18, 2025, 10:24 PM

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Omega Speedmaster Professional Moonwatch 310.30.42.50.01.002 – Full Kit – Excellent Condition – $5,900

Omega - 310.30.42.50.01.002 · $5,900

This Omega Speedmaster Professional Moonwatch is a highly sought-after model, known for its robust design and iconic status.

Condition: Excellent Condition
Movement: Automatic movement

Posted at

Oct 18, 2025, 10:53 AM

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Omega Speedmaster racing 9900 44.25mm 329.33.44.51.01.001 under warranty

Omega - 329.33.44.51.01.001 · $5,800

This is a Omega Speedmaster racing watch, model 9900, featuring a 44.25mm case size and a factory warranty until OCT 2024.

Condition: Good condition
Case size: 44.25mm
Warranty: Factory warranty until OCT 2024

Posted at

Oct 17, 2025, 9:19 PM

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Pristine Omega Speedmaster Sapphire Sandwich - Full Set!

Omega - 310.30.42.50.01.002 · $6,499

A timeless and instantly recognizable watch, meticulously cared for by the seller over two years.

Condition: Pristine
Worn: 10-12 times over two years
Crystal condition: Perfect
Bezel condition: Perfect

Posted at

Oct 17, 2025, 8:27 PM

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Omega Speedmaster 3590.50

Omega - 3590.50

Title: [WTS] Omega Speedmaster 3590.50

Posted at

Oct 17, 2025, 5:28 PM

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Omega 1861 Speedmaster Bracelet and Forstner Flatlink Contemporary

Omega - 1861 Speedmaster Bracelet and Forstner Flatlink Contemporary · $480

A Omega 1861 Speedmaster, sold with a Forstner bracelet and an additional Forstner Flatlink Contemporary. The first has some wear on the clasp and links, while the second is in excellent condition.

Condition: Forstner bracelet (worn) - Speedmaster bracelet (excellent)
Shipping Cost Uk: 10
Shipping Cost International: 25

Posted at

Oct 17, 2025, 4:05 PM

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New & Unworn 2025 Omega Speedmaster Professional Moonwatch ‘Silver Snoopy Award’ 50th 310.32.42.50.02.001 Complete

Omega - 310.32.42.50.02.001 · $15,950

The Omega Speedmaster Professional Moonwatch 'Silver Snoopy Award' is a limited edition watch celebrating the 50th anniversary of Omega's recognition from NASA astronauts for its role in the Apollo 13 mission. It features an animated caseback with a mesmerizing display of Snoopy piloting his Command and Service Module in lunar orbit.

Condition: Brand New
Year: 2025
Contents: Complete Collector Set with all the goodies

Posted at

Oct 17, 2025, 12:00 PM

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