Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet

Reference 310.55.42.50.51.001

Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold is a stunning blend of luxury and functionality, with its Sedna gold construction and intricate chronograph features. The watch's sheer elegance is undeniable, with a black sunburst finish contrasting beautifully with gem-set indexes and ruby accents. Certified as a Master Chronometer by METAS, the Omega caliber 3861 movement is an engineering marvel, resistant to magnetic fields up to 15,000 gauss. With small seconds, hours, and minutes hands, the chronograph functionality offers precision timing. The watch's durability is also noteworthy, with sapphire glass adding scratch resistance. The Sedna gold bracelet ensures a secure fit, while its adjustability makes it comfortable for wearers of all wrist sizes. This timepiece is not just a luxury item but a conversation starter, status symbol, and piece of horological history.

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Key Features

Omega caliber 3861 movement with Co-Axial escapement and silicon balance spring
Sedna gold construction with gem-set indexes and ruby accents
50m water resistance with sapphire glass scratch resistance
Chronograph functionality with small seconds, hours, and minutes hands
Adjustable Sedna gold bracelet for secure fit on all wrist sizes

Specifications

Brand

Omega

Family

Speedmaster

Model

Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet

Reference

310.55.42.50.51.001

Movement

3861

Movement Features

Small Seconds, Hours, Minutes
Chronograph
Chronometer

Case

Sedna Gold 42mm

Dial Color

Black

Crystal

Sapphire

Water Resistance

Current Listings

Omega Speedmaster Reduced 39mm - Mother of Pearl Dial - Price Reduced ‼️

Omega - Speedmaster Reduced · $2,495

A super rare and unique Omega Speedmaster with a Mother of Pearl dial, available for sale today.

Condition: Decent condition, light scratching on case and hairlines on bezel
Case size: 39mm
Dial color: Mother of Pearl

Posted at

Dec 10, 2025, 6:39 PM

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2024 Omega Speedmaster Moonwatch Professional White Dial 310.30.42.50.04.001 Full Set

Omega - 310.30.42.50.04.001 · $7,477

This is a brand new 2024 Omega Speedmaster Moonwatch Professional White Dial with excellent condition and under warranty.

Condition: Excellent, minimal signs of wear
Case Material: Stainless Steel
Bracelet Length: Full links

Posted at

Dec 10, 2025, 2:51 PM

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Omega Speedmaster Moonwatch Sapphire Sandwich Full Set - 310.30.42.50.01.002

Omega - 310.30.42.50.01.002 · $6,100

A Speedmaster Moonwatch from Omega's personal collection, upgraded to a Rolex Explorer.

Condition: Very nice preowned condition
Case material: Stainless Steel
Case dimensions: 42mm diameter
Bezel: Black Bezel Stainless Steel

Posted at

Dec 10, 2025, 11:42 AM

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Omega Speedmaster Moonwatch 310.304.25.001.002 ♦️Like New 2022♦️

Omega - 310.304.25.001.002 · $6,400

A Omega Speedmaster Moonwatch from 2022, sold with a full set including box and papers.

Condition: Like New
Year: 2022
Set included: Full set (box & papers)
Payment methods: Bank Wire / Credit card (+4.9%) / Crypto

Posted at

Dec 10, 2025, 9:30 AM

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[US] Omega Speedmaster Chronoscope - White Panda Dial - 43mm - 329.30.43.51.02.002

Omega - 329.30.43.51.02.002 · $5,150

This Omega Speedmaster Chronoscope features a 43mm case size, white panda dial, and includes the original box, user manual, and other accessories.

Condition: Fantastic condition with minor hairlines on clasp and bracelet
Case Size: 43mm
Dial Color: white panda

Posted at

Dec 10, 2025, 8:22 AM

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Omega Speedmaster Professional Moonwatch 42mm FULL SET! Ref. 310.30.42.50.01.001 — $5,500

Omega - 310.30.42.50.01.001 · $5,500

This Omega Speedmaster Professional Moonwatch is a 42mm stainless steel watch with a black dial and engraved caseback, featuring a co-axial master chronometer movement with a power reserve of approximately 50 hours. It comes as a full set with original boxes and papers.

Condition: Very Good used condition
Case size: 42mm diameter
Crystal type: Hesalite crystal

Posted at

Dec 9, 2025, 8:45 PM

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Omega Speedmaster Reduced Automatic GREAT SET w/ Original Papers & Omega Service Paperwork!

Omega - Speedmaster Reduced · $2,850

A classic Omega Speedmaster Reduced in excellent condition, complete with original papers and Omega service history. This watch features a 39mm stainless case, automatic movement serviced by Omega in 2018, and an original Omega bracelet.

Condition: Excellent, lightly worn vintage watch with some signs of age
Case size: 39mm diameter
Bracelet size: adjusts to 6.7-7.1 inches with extra links
Movement service history: fully serviced by Omega in 2018

Posted at

Dec 9, 2025, 8:26 PM

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2022 Omega Speedmaster Professional Moonwatch Sapphire 310.30.42.50.01.002 Full Set

Omega - 310.30.42.50.01.002 · $6,350

Additional Details: Model: Speedmaster Professional Moonwatch Ref# 310.30.42.50.01.002, a 2 - 3 sentence summary of the watch in the listing is not available as there is no other information about the watch.

Condition: Very nice preowned condition with some light scratches on the case, bracelet and buckle
Case material: Stainless Steel
Case dimensions: 42 mm diameter
Bezel material: Stainless Steel

Posted at

Dec 9, 2025, 8:10 PM

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Omega Speedmaster Automatic Mark 40 175.0084 Triple Calendar watch 1680 USD

Omega - Mark 40 175.0084 · $1,680

Model name: Speedmaster Automatic Triple Calendar

Posted at

Dec 9, 2025, 4:55 PM

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