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 DATE 3513.50 WITH PAPERS

Omega - 3513.50 · $1,750

A lightly worn Omega Speedmaster Date with a dated card, extra link, and no box.

Condition: lightly worn
Diameter: 40mm

Posted at

Apr 22, 2026, 8:47 PM

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2026 Omega Speedmaster Moonwatch Professional 42mm Steel 310.30.42.50.01.001 Full Set

Omega - 310.30.42.50.01.001 · $6,050

2026 Omega Speedmaster Moonwatch Professional, a stainless steel manual wind watch with black dial and hesalite crystal.

Condition: Excellent preowned condition with some light scratches.
Case dimensions: 42mm
Movement type: Manual Wind, Mechanical

Posted at

Apr 22, 2026, 7:54 PM

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2023 OMEGA SPEEDMASTER PROFESSIONAL 310.30.42.50.01.002 $6499

OMEGA - 310.30.42.50.01.002 · $6,499

2023 OMEGA SPEEDMASTER PROFESSIONAL with manual wind movement and sapphire crystal. Features a 42mm case size and 50 hour power reserve.

Condition: Pre owned, cosmetic condition 9/10
Case size: 42mm diameter
Bracelet: tapered stainless steel with micro adjustments
Movement: manual wind 3861

Posted at

Apr 22, 2026, 7:15 PM

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2021 OMEGA SPEEDMASTER PROFESSIONAL 310.30.42.50.01.002

OMEGA - 310.30.42.50.01.002 · $5,799

2021 OMEGA SPEEDMASTER PROFESSIONAL features a manual wind movement, 50 hour power reserve, and 42mm case size. It also comes with a sapphire crystal and 50 meters water resistance.

Condition: Pre owned, cosmetic condition 7/10
Case size: 42mm diameter
Bracelet material: tapered stainless steel
Movement: manual wind 3861

Posted at

Apr 22, 2026, 6:32 PM

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Omega Speedmaster Professional "Sapphire Sandwich" (Ref. 310.30.42.50.01.002)/Full set

Omega - 310.30.42.50.01.002 · $6,000

This Omega Speedmaster Professional, also known as the Sapphire Sandwich, is a manual-wind watch with a Master Chronometer movement and features a stunning Caliber 3861 movement visible through an exhibition caseback.

Condition: pristine
Purchase Price: 9000
Dimensions: 42mm diameter, 20mm lug width
Bracelet Type: tapered

Posted at

Apr 22, 2026, 3:53 PM

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3510.50 Omega Reduced Speedmaster Excellent vintage condition with original warranty card Serviced recently

Omega - 3510.50 · $3,300

This is a 26-year-old Omega Reduced Speedmaster in excellent vintage condition, with original warranty card and recently serviced movement.

Condition: Excellent vintage condition
Warranty card: Original warranty card included
Movement serviced: Recently serviced movement

Posted at

Apr 22, 2026, 1:49 PM

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Omega Speedmaster Date Chronometer 3210.50.00 — Cal. 1164 (Serviced) — $2,099 Shipped (Tariff Coverd)

Posted at

Apr 22, 2026, 1:29 PM

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Omega Speedmaster Professional 🌘 Moonwatch 🌒 Sapphire Sandwich LNIB 9/25

Omega - 310.30.42.50.01.002 · $6,875

A Omega Speedmaster Professional in like new condition with a sapphire sandwich case and reference number 310.30.42.50.01.002.

Condition: Like new
Missing items: outer box, user's manual, Moonwatch booklet, outer pillow

Posted at

Apr 22, 2026, 11:58 AM

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Omega Speedmaster Professional Reverse New Apr 2026, $10.2k

Omega - 310.30.42.50.01.004 · $10,200

This Omega Speedmaster Professional Reverse is a brand new watch with a reference number of 310.30.42.50.01.004, coming with its original box and April 2026 warranty.

Condition: Brand New
Shipping cost: $200 for USA shipping
Payment methods: Wire or Credit Card (+4.9% and 4 days clearance)
Warranty: Apr 2026 warranty

Posted at

Apr 22, 2026, 9:55 AM

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