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 ‘Sapphire Sandwich’ Moonwatch White, B+P 2025

Omega - 31032425004001 · $6,900

This is a white Omega Speedmaster 'Sapphire Sandwich' Moonwatch, featuring a 42mm case size and Omega 3861 movement.

Condition: Very Good preowned condition with minor hairlines from light handling
Case size: 42mm
Movement: Omega 3861
Power reserve: 5 hours

Posted at

Dec 20, 2025, 9:16 PM

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Omega Speedmaster FOIS | 310.30.40.50.06.001 | Complete Box & Papers 2024 | $6,849 Shipped

Omega - 310.30.40.50.06.001 · $6,849

This Omega Speedmaster "First Omega in Space" (FOIS) model is a historically faithful modern reference that pays homage to the watch worn by astronaut Walter Schirra during the Mercury-Atlas 8 mission. It has a straight-lug case, symmetrical profile, and hesalite crystal.

Condition: Excellent / near-mint
Case diameter: 40mm
Crystal material: hesalite
Year purchased: 2024

Posted at

Dec 20, 2025, 9:13 PM

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Omega Speedmaster Dark Side of the Moon 311.92.44.30.01.001 | Ceramic |FULL SET

Omega - 311.92.44.30.01.001 · $7,850

This Omega Speedmaster Dark Side of the Moon features a full-ceramic case and buckle, presented in excellent condition.

Condition: Mint, like-new
Case material: Full ceramic
Year: 2019

Posted at

Dec 20, 2025, 6:57 PM

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Omega Speedmaster “First Omega in Space” FOISRef: 310.30.40.50.06.001 | 2025 | Full Set | Very Good Condition | Active Factory Warranty

Omega - 310.30.40.50.06.001

This Omega Speedmaster is known as the 'First Omega in Space' with a FOIS reference number, specifically Ref: 310.30.40.50.06.001, from the year 2025.

Condition: Very Good

Posted at

Dec 20, 2025, 5:33 PM

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Omega Speedmaster Moonwatch Professional White dial Black rubber strap 42mm Box & Papers 310.32.42.50.04.001

Omega - 310.32.42.50.04.001 · $7,795

This Omega Speedmaster Moonwatch Professional features a white dial on a black rubber strap, with a 42mm case and various complications including a chronograph and tachymeter.

Condition: Excellent
Case Material:
Diameter: 42mm
Water Resistance:

Posted at

Dec 20, 2025, 4:30 PM

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