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 Date 40mm Full Kit 18k Gold/Steel

OMEGA - 323.21.40.40.02.001 · $3,600

Up for sale is a Omega Speedmaster Date 40mm Steel/Yellow Gold Ref. 323.21.40.40.02.001, This is a full kit.

Case Size: 40mm
Materials: Steel/18k Yellow Gold

Posted at

Feb 16, 2026, 10:39 AM

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Omega Speedmaster Moonphase 304.33.44.52.03 Blue Dial 44.25mm Full Set

Omega - 304.33.44.52.03 · $7,494

The Omega Speedmaster Moonphase features a blue dial, moonphase complication at 6 o'clock, and Co-Axial Master Chronometer automatic movement.

Condition: Very good
Case size: 44.25 mm
Movement type: Co-Axial Master Chronometer automatic

Posted at

Feb 16, 2026, 9:59 AM

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Omega Speedmaster FOIS Numbered Edition 311.32.40.30.01.001 w/ Ed White Mods [USA-TN]

Omega - 311.32.40.30.01.001 · $3,500

This 2014 Omega Speedmaster FOIS features a numbered edition, manual winding movement, and ultra-wearable dimensions of 39.7mm x 19 x 47. The watch has been modified with OEM Speedmaster Professional Moonwatch hands and given a professional patina treatment to give it a vintage aesthetic.

Condition: excellent overall condition with honest light wear
Movement type: manual winding 1861 movement
Water resistance: unknown
Dimensions: 39.7mm x 19 x 47

Posted at

Feb 15, 2026, 6:04 PM

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Omega Speedmaster Broad Arrow 1957 321.10.42.50.01.001 Full Set

Omega - 321.10.42.50.01.001 · $4,100

A modern tribute to the legendary original Speedmaster design, this Omega Speedmaster Broad Arrow 1957 features a black dial and classic Speedmaster styling with a modern 42 mm case for everyday wearability.

Condition: Excellent
Case size: 42 mm diameter
Set: Full set (watch, box, papers, and accessories as originally supplied)

Posted at

Feb 15, 2026, 4:21 PM

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Omega Speedmaster Hesalite 310.30.42.50.01.001 $5,750 Full Set

Omega - 310.30.42.50.01.001 · $5,750

This Omega Speedmaster Hesalite is an iconic watch under $10k, available with all original accessories.

Condition: Excellent preowned condition
Shipping: Fully insured shipping included in price

Posted at

Feb 15, 2026, 3:47 PM

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Omega Speedmaster Black Dial 3513.50 Date

Omega - 3513.50.00 · $1,700

A 39mm Omega Speedmaster Date with a black dial, recently serviced and polished.

Condition: 100% authentic Omega, recently serviced and polished
Case Diameter: 39mm
Cosmetic Condition Glass: flawless
Cosmetic Condition Case: no damage

Posted at

Feb 15, 2026, 3:17 PM

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Omega 2023 Speedmaster Professional

Omega - Speedmaster Professional · $6,500

Additional Details: I’m selling my Omega Speedmaster Professional because I finally got my 321 Speedmaster. Watch is a 9/10 in shape.

Condition: 9/10 in shape
Material: full set

Posted at

Feb 15, 2026, 2:44 PM

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Omega Speedmaster CK2998 Limited Edition “Blue Panda” - Full Set - 311.33.40.30.02.001 - Price Reduced!

Omega - 311.33.40.30.02.001 · $6,850

This Omega Speedmaster CK2998 'Blue Panda' is a modern classic with a striking design and features a manual winding OMEGA calibre 1861 movement.

Condition: Excellent condition, barely worn
Case size: 40mm
Movement: Manual winding OMEGA calibre 1861

Posted at

Feb 15, 2026, 1:52 PM

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🚀 ‼️Omega Speedmaster Mk40 (Ref. 3520.50)‼️ 🚀

Omega - 3520.50 · $2,899

A masterclass in packaging, the Omega Speedmaster Mk40 (Ref. 3520.50) features a 12-hour chronograph, 24-hour indicator, and full calendar in a case that wears better than standard 42mm Professional models.

Condition: Good condition with honest wear. Small concentration of tiny pin marks on the left side of the case.
Case Wear: left side
Diameter: 39mm
Lug To Lug: 44.5mm

Posted at

Feb 15, 2026, 1:38 PM

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