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 Professional 42mm “Sapphire Sandwich” 310.30.42.50.01.002 - 11/2025 Complete Set

Omega - 310.30.42.50.01.002 · $7,350

This Omega Speedmaster Professional is a 'Sapphire Sandwich' model with a 42mm case, known as the Moonwatch.

Condition: Like New
Case size: 42mm
Service history: Unknown

Posted at

Jan 18, 2026, 6:07 PM

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Omega Speedmaster Professional Link - $75

Omega - Speedmaster Professional Link · $75

A replacement link set for the Omega Speedmaster Professional, sealed and unopened, received directly from Omega.

Material: genuine OEM
Status: sealed and unopened
Origin: received directly from Omega

Posted at

Jan 18, 2026, 5:12 PM

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Omega Speedmaster Broadarrow. $3450 only !!

Omega - Speedmaster Broadarrow · $3,450

A Omega Speedmaster Broadarrow for sale, available with shipping from NJ USA.

Shipping Location: NJ USA
Shipping Method: Fedex with insurance
Shipping Global: yes, globally accepted

Posted at

Jan 18, 2026, 3:43 PM

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2025 OMEGA Speedmaster Moonwatch Pro White 310.30.42.50.04.001 Full Set

OMEGA - 310.30.42.50.04.001 · $7,699

For sale is a classic Omega Speedmaster Moonwatch Pro with a white dial and a December 2025 date.

Condition: Very good condition, with a mark on the side of the case
Msrp: $9,100 + Tax
Shipping: Fully insured overnight via FedEx to the closest FedEx Office

Posted at

Jan 18, 2026, 3:12 PM

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Omega Speedmaster Pilot (332.10.41.51.01.002) | 2025

Omega - 332.10.41.51.01.002 · $7,900

This Omega Speedmaster Pilot is a recently released version of the Speedmaster, featuring an automatic Caliber 9900 movement and a 40.85mm steel case.

Condition: Excellent, lightly worn
Case Size: 40.85 mm diameter
Bracelet Material: Steel
Crystal: Sapphire

Posted at

Jan 18, 2026, 3:11 PM

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View listing on r/WatchExchange