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 Professional - Hesalite - on strap or bracelet - full kit

Omega - Speedmaster Professional · $4,950

This Omega Speedmaster Professional is a Hesalite version, sold on the original factory fabric strap or an Omega factory bracelet. It comes in full kit with inner and outer boxes, chronometer card, pictogram card, Jomashop warranty card, hang tags, and case back sticker.

Condition: Very good used condition
Strap/bracelet options: original factory strap and Omega factory bracelet
Case condition: a few hairlines visible on polished portions

Posted at

Jun 17, 2025, 9:17 PM

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Omega De Ville 36mm with Speedmaster Cal. 1861 Movement

Omega - 4540.51 · $1,999.002

This Omega De Ville Prestige chronograph features a 36.1mm stainless steel case, hand-wound Cal. 1861 chronograph movement, and dauphine-style hands on a black color dial.

Condition: Excellent condition with minor wear marks on case and bracelet
Case size: 36.1 mm
Lug width: 19 mm
Movement: Cal. 1861

Posted at

Jun 17, 2025, 5:49 PM

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View listing on WatchUseek

Omega Speedmaster 3513.50 | $1500+Shipping| USA only

Omega - 3513.50 · $1,500

A 39mm stainless steel Omega Speedmaster Date 3513.50, featuring an automatic chronograph movement (Caliber 1152) and a clean black dial with triple register layout.

Condition: good with signs of wear
Case Size: 39mm diameter
Movement Type: automatic chronograph
Water Resistance: 100m depth rating

Posted at

Jun 17, 2025, 4:17 PM

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Omega 36mm with Speedmaster Cal. 1861 Movement $1,999

Omega - 4540.51 · $1,999

This Omega De Ville Prestige chronograph is a rare hidden gem from the 90's Omega catalog, featuring a 36.1 mm stainless steel case and hand-wound Cal. 1861 chronograph movement.

Condition: excellent with minor wear marks on case and bracelet
Case size: 36.1mm diameter
Lug width: 19mm
Movement: Cal. 1861

Posted at

Jun 17, 2025, 12:48 PM

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Omega Speedmaster Chronoscope Co-Axial 43mm 329.30.43.51.02.001

Omega - 329.30.43.51.02.001 · $5,400.005

A unique version of the Speedmaster, featuring a modern twist on classic Omega designs with distinctive timing scales and a beautiful dial.

Condition: Excellent
Case size: 43mm diameter
Water resistance: 30m

Posted at

Jun 17, 2025, 12:11 PM

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Omega Speedmaster 'Ed White' Caliber 321 - 1965

Omega - 105.003 · $8,800

A 1965 Omega Speedmaster 'Ed White' Caliber 321, one of the most celebrated chronographs in watch history. It features a straight lug construction, stepped dial design, and reliable hand-wound Caliber 321 movement. This watch is highly prized among collectors for its historical significance and clean, functional aesthetic.

Condition: Restored with new dial, hands, crystal, bracelet, and movement overhaul
Movement: Caliber 321
Diameter: 40mm

Posted at

Jun 17, 2025, 10:47 AM

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(EU ONLY) Omega Speedmaster Reduced - Reverse Panda 3511.50

Omega - 3511.50 · $2,290

This Omega Speedmaster Reduced features a Reverse Panda dial, housed in a steel case with a diameter of 39mm. The watch is powered by Omega's Caliber 1155/Valjoux 7750 movement, manufactured in the 1990s.

Condition: Pre-owned with surface scratches
Movement: Omega Caliber 1155/Valjoux 7750
Manufacture date: 1990s
Thickness: 13.5mm

Posted at

Jun 17, 2025, 10:26 AM

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Omega Speedmaster Racing Chronograph “Schumacher” Ref. 3810.61 – $2,399

Omega - 3810.61 · $2,399

Up for grabs is my Omega Speedmaster Schumacher Racing (ref. 3810.61.41), a vibrant and rare edition featuring a red dial with yellow accents and automatic chronograph movement. Housed in a 39mm case, it wears well on most wrists and blends sporty appeal with vintage Omega design cues. Perfect for collectors or daily wearers looking for something bold yet refined.

Condition: Excellent pre-owned condition
Case Size: 39mm
Dial Condition: pristine
Crystal Condition: pristine

Posted at

Jun 17, 2025, 9:21 AM

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