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.

Buy Now on Jomashop

This is an affiliate link

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 Moonwatch Professional 42mm White Dial 310.30.42.50.04.001 Complete

Omega - 310.30.42.50.04.001 · $7,650

A 42mm Omega Speedmaster Moonwatch Professional with a white dial is being sold.

Condition: In very good condition, rated at 9.7/10
Condition Rating: 9.7/10
Included Accessories: Inner & outer boxes, manual, booklet, Pictogram card, Master Chronometer card, removed links and warranty card

Posted at

Feb 13, 2026, 10:41 AM

Active

View listing on r/WatchExchange

Omega Speedmaster White 2024 Full set + OEM Red racing leather strap - Warranty until July 2029 - 310.30.42.50.04.001 - $7300 + 🏷 🔥 🚀

Omega - 310.30.42.50.04.001 · $7,300

This is the Omega Speedmaster White, considered by the seller to be one of the most beautiful Speedmasters.

Condition: good condition
Strap Type: red leather racing strap
Warranty Date: until July 2029

Posted at

Feb 13, 2026, 9:44 AM

Active

View listing on r/WatchExchange

Omega Speedmaster FOIS 310.30.40.50.06.001 box and papers $6600+ 🏷️

Omega - 310.30.40.50.06.001 · $6,600

The Omega Speedmaster FOIS is available for sale with its iconic design and features such as a hesalite-like form sapphire crystal and CVD coated dial. It has a 39.7mm flat link bracelet with comfort release adjustment system and a 50 hour power reserve.

Condition: Crystal/dial: clean, Case: clean, Caseback: light scratches, Bracelet: light scratches, Clasp: one surface level scratch
Water resistance: 5 bar
Bracelet adjustment system: comfort release
Crystal type: hesalite-like sapphire

Posted at

Feb 12, 2026, 10:16 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Reduced 39mm 3510.61 “Red Schumacher” | Watch Only

Omega - 3510.61 · $2,999

This Omega Speedmaster Reduced 39mm is a 'Red Schumacher' variant, featuring Hesalite with minor marks, and a service history unknown.

Condition: Good Pre-Owned Condition
Case Size: 39mm diameter
Band Links: 18 links
Wrist Fit: 6.5 inch wrist comfortably

Posted at

Feb 12, 2026, 8:38 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Moonwatch Professional Sapphire Sandwich

Omega - 310.30.42.50.01.002 · $5,650

The Omega Speedmaster Moonwatch Professional Sapphire Sandwich is a stunning watch that comes with double box, cards and booklet.

Condition: great condition
Water Resistance: 30m

Posted at

Feb 12, 2026, 4:53 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Automatic 3510.50

Omega - 3510.50 · $1,850

A discontinued Omega Speedmaster Reduced model from 1998, featuring an automatic self-winding movement and a black dial with luminous hands and markers.

Condition: good
Case Size: 39mm
Movement Type: automatic self-winding

Posted at

Feb 12, 2026, 4:34 PM

Active

View listing on r/WatchExchange

‼️Omega Speedmaster “FOIS” 311.32.40.30.01.001 LIKE NEW CONDITION *$4500 shipped** ‼️

Omega - 311.32.40.30.01.001 · $4,500

The Omega Speedmaster 'First Omega in Space' is a manual-wind watch with a 39.7mm case, powered by the Caliber 1861 movement.

Condition: Excellent / like new
Case size: 39.7mm
Movement: Manual wind (Caliber 1861)
Box condition: Original box shows wear

Posted at

Feb 12, 2026, 4:33 PM

Active

View listing on r/WatchExchange

[CAN/CONUS] Omega Speedmaster 1st gen. FOIS “Ed White In Space” mod

Omega - FOIS · $4,555

A first generation Omega Speedmaster First Omega In Space with a Ed White modification, featuring a vintage logo dial, Alpha-hands, and other upgrades.

Condition: Very good condition, some wear from occasional usage but nothing of a concern
Dial: vintage logo from Omega Broad Arrow 3594.50q
Hands: Speedy baton hands
Bezel: Spiralwinder Ceramic bezel

Posted at

Feb 12, 2026, 2:36 PM

Active

View listing on r/WatchExchange

Omega Speedmaster Sapphire Sandwich Full Set, 09/2025 Warranty

Omega - Speedmaster sapphire sandwich · $6,850

A Omega Speedmaster sapphire sandwich, recently acquired and only worn twice, with a full set of accessories.

Condition: Excellent condition
Warranty Date: 09/2025
Accessories: Full set with inner and outer box, papers, hang tag, and all spare links

Posted at

Feb 12, 2026, 10:05 AM

Active

View listing on r/WatchExchange