Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Ruby / Black - Ruby / Bracelet
Reference 310.55.42.50.51.001
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
- 50
Current Listings

Omega SPEEDMASTER PROFESSIONAL MOONWATCH WHITE DIAL 2024 WARRANTY FULL SET
New 2024 model Omega Speedmaster Professional Moonwatch with stainless steel case and white dial.
- Condition: Excellent, unpolished condition
- Movement: Manual-winding chronograph 3861 with co-axial escapement
- Case diameter: 42mm
- Crystals: Sapphire crystals

2014 Omega Speedmaster Ref. 326.30.40.50.01.001 with Box & Papers
The Omega Speedmaster Ref. 326.30.40.50.01.001 features a classic 40mm stainless steel case powered by the Co-Axial Calibre 3330, with a sporty black dial and black sub dials for an automotive-inspired look.
- Condition: Excellent (very little to no signs of wear)
- Case size: 40mm
- Movement type: Automatic
- Depth rating: unknown (no depth rating mentioned)

2023 Omega Speedmaster Moonwatch Pro 42mm Yellow Gold Green Dial
This is a 2023 Omega Speedmaster Moonwatch Pro in yellow gold with a green dial, featuring a 42mm case size and Master Chronometer certification.
- Condition: Excellent
- Warranty Years: 5
- Case Size: 42mm
Omega Speedmaster Moonphase 42mm 3575.20 (2001 Box and Papers)
A pre-owned Omega Speedmaster Moonphase with a 42mm case size, featuring a moon phase display. The watch is in great condition, but shows some signs of wear.
- Condition: Pre-owned, slight wear on bracelet and clasp, marks on bezel
- Case Size: 42mm
- Bracelet Links: 16.5 links
- Service History: Unknown ( -5 s/d, 230+ AMP)
Omega Speedmaster Hesalite 42mm 3572.50 (Watch and Card)
A 42mm Omega Speedmaster Hesalite is being listed in great pre-owned condition, featuring a micro-scratched hesalite crystal and some nicks by the tachymeter. The watch includes 15.5 links and a warranty card.
- Condition: Pre-owned, with minor scratches and nicks on the hesalite crystal
- Service history: Unknown
- Water resistance: +13 s/d (not specified)
- Movement amp hours: >280

2024 Omega Speedmaster Moonwatch Hesalite 42mm 31.30.42.50.01.001 BOXES/PAPERS!
This 2024 Omega Speedmaster Moonwatch comes in a 42mm stainless steel case with a black dial and fixed stainless steel bezel. It features automatic movement, sapphire crystal, and water resistance up to 100 meters.
- Condition: Pre-owned with typical cosmetic wear
- Case diameter: 42mm
- Band material: Stainless Steel
- Water resistance depth rating: 100m

Omega Speedmaster Moonwatch 3861 - White - 310.30.42.50.04.001 ( new )
This is a brand new Omega Speedmaster Moonwatch Professional with a white dial and sapphire crystal on a stainless steel bracelet.
- Condition: Brand new
- Movement: Omega Master Chronometer Movement
- Case size: 42mm
- Material: Stainless Steel

Omega Speedmaster Moonwatch Sapphire - 3861 - 310.30.42.50.01.002 (new / 2025)
This is a brand new Omega Speedmaster Moonwatch Professional, featuring a 42mm stainless steel case and an Omega Master Chronometer movement.
- Condition: Brand new
- Case material: stainless steel
- Movement type: Omega Master Chronometer

2023 Omega Speedmaster Pro Moonwatch 42mm 310.30.42.50.01.002 Steel Black Dial
This is a 2023 Omega Speedmaster Professional Moonwatch with a stainless steel case and black dial, measuring 8.0inch in diameter on the wrist.
- Condition: Excellent
- Material: Stainless Steel
- Size: 40mm diameter
- Warranty: International Warranty card dated 2023 and Existing Factory warranty