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

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Posted at

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Water Proofness: 50 meters depth rating

Posted at

Feb 5, 2026, 3:20 PM

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Posted at

Feb 5, 2026, 2:38 PM

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Condition: perfect
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Posted at

Feb 5, 2026, 1:37 PM

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Condition: Good condition with some usage marks and minimal oxidation
Case Size: 39mm diameter
Water Resistance: Not specified
Movement Type: Automatic

Posted at

Feb 5, 2026, 4:18 AM

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Condition: Very nice overall condition, with honest wear consistent with age
Size: 42mm diameter
Year: 1969
Movement Status: Professionally serviced in January 2026

Posted at

Feb 4, 2026, 10:26 PM

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2024 OMEGA SPEEDMASTER WHITE DIAL 310.30.42.50.04.001 $7399

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This is a 2024 OMEGA SPEEDMASTER with a white dial and various features such as a stainless steel case, sapphire crystal, and a 50-hour power reserve.

Condition: Pre Owned, Cosmetic Condition: 9/10
Case Material: STAINLESS/SAPPHIRE
Water Resistance: 50 METERS/165 FEET

Posted at

Feb 4, 2026, 9:40 PM

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Omega Speedmaster Reduced 39mm Serviced ⏱

Omega - Speedmaster Reduced · $2,250

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Case Size: 39mm
Lug To Lug: 45mm
Lug Width: 18mm

Posted at

Feb 4, 2026, 9:18 PM

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2023 Omega Speedmaster Moonwatch 42mm Moonshine Gold Green 310.60.42.50.10.001 Full Set

Omega - 310.60.42.50.10.001 · $29,200

2023 Omega Speedmaster Moonwatch 42mm Moonshine Gold Green, a manual wind mechanical watch in very good condition.

Condition: Very nice preowned condition with some light scratches on the case and bracelet
Case Dimensions: 42mm diameter
Movement: Manual Wind, Mechanical
Original Purchase Date: September 2023

Posted at

Feb 4, 2026, 8:13 PM

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