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

OEM Authentic Omega Speedmaster 20mm Bracelet - $575 shipped CONUS

Omega - 41mm Speedmaster, 20mm lug width, 1620/887 bracelet code · $575

A 41mm Omega Speedmaster in good condition, featuring a 20mm bracelet that should fit most Speedmasters with the same lug width.

Condition: Good condition with some desk dive rash
Bracelet code: 1620/887
Lug width: 20mm

Posted at

Dec 3, 2025, 7:56 PM

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- Omega SpeedMaster Professional 3570.50 Matte Black Dial - $4,450

Omega - 3570.50 · $4,450

The Omega Speedmaster Professional features a 42mm stainless steel case with a matte black dial and a black bezel insert, powered by an unknown movement.

Condition: excellent
Case size: 42mm
Bracelet length: up to 7 inches / 17.8 cm
Bracelet material: stainless steel

Posted at

Dec 3, 2025, 6:01 PM

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FINAL Price Reduction Omega Speedmaster Professional White Dial Full Set on Speedmaster '57 Flat Link Bracelet

Omega - 310.30.42.50.04.001 · $7,500

This Omega Speedmaster Professional features a white dial and is paired with a Speedmaster '57 flat link bracelet, which honors the original 1957 look.

Condition: Fairly new, beloved
Bracelet type: Speedmaster '57 flat link
Bracelet installation location: Omega Boutique at South Coast Plaza in Costa Mesa, CA
Bracelet date: 8/2025

Posted at

Dec 3, 2025, 5:16 PM

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Omega Speedmaster Racing 32630405002001

Omega - 32630405002001 · $2,900

This Omega Speedmaster Racing is in excellent working order and features a sleek design.

Condition: great condition
Shipping Methods: Zelle, PayPal, Venmo, or wire
Shipping Costs: additional $60 for insured overnight FedEx

Posted at

Dec 3, 2025, 4:10 PM

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Omega Speedmaster 310.32.42.50.01.002

Omega - 310.32.42.50.01.002 · $6,300

This Omega Speedmaster is from 2022 and runs well with everything in great shape.

Condition: Great condition
Year: 2022
Shipping cost: 60

Posted at

Dec 3, 2025, 3:52 PM

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2006 OMEGA SPEEDMASTER RACING 32630405002001

Omega - 32630405002001 · $1,900

2006 OMEGA SPEEDMASTER RACING is being sold.

Payment Methods: Zelle, Venmo, PayPal, wire transfer

Posted at

Dec 3, 2025, 3:36 PM

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Omega Speedmaster 38 Chronograph 324.30.38.50.02.001 $4,200

Omega - 324.30.38.50.02.001 · $4,200

For sale is my Omega Speedmaster 38mm chronograph in like new mint condition, complete with box and papers.

Condition: Like new, mint condition
Case Size: 38mm

Posted at

Dec 3, 2025, 2:31 PM

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2024 Omega Speedmaster - First Omega in Space - 310.30.40.50.06.001 - full kit - factory warranty - very good condition

Omega - 310.30.40.50.06.001 · $6,950

A modern tribute to the first Omega worn beyond Earth's atmosphere, featuring a Master Chronometer-certified movement and unique hand designs.

Condition: Very good
Case Diameter: 39.7mm
Movement: Master Chronometer-certified 3861

Posted at

Dec 3, 2025, 1:58 PM

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Omega Speedmaster Professional White Dial Ref: 310.32.42.50.04.001

Omega - 310.32.42.50.04.001 · $7,450

This Omega Speedmaster Professional Moonwatch features a white dial with red accents and is one of the seller's favorite takes on a classic.

Condition: New
Shipping: Free insured overnight shipping
Included items: Double boxed - inner and outer, 3 warranty cards, manual/booklet, travel case, pouch
Buyer perks: Open to trades, 3rd party escrow and authentication available, 12 month trade ins and buy backs, timegrapher testing

Posted at

Dec 3, 2025, 10:19 AM

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