Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

Reference 310.55.42.50.13.001

Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet

About this watch

The Omega Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet is a masterpiece of horology, blending art, history, and cutting-edge technology. Crafted from Sedna Gold, this watch boasts a unique color that's both warm and striking. Its round shape and sunburst brown finish give it a luxurious feel, while the diamond-set bezel adds a touch of elegance. The 3861 is equipped with a chronograph feature, allowing you to measure elapsed time with precision. At its heart lies the Omega caliber 3861, an updated version of the legendary caliber 861/1861, featuring a co-axial escapement and silicon balance spring for accuracy and reliability. Master Chronometer certified by METAS, this watch has undergone rigorous testing to withstand magnetic fields of up to 15,000 gauss. Its sleek design and exceptional craftsmanship make it a standout in any collection. Whether you're at a formal event or a casual outing, this watch is sure to turn heads.
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Key Features

  • Sedna Gold case
  • Manual-winding chronograph movement
  • Co-axial escapement and silicon balance spring
  • Master Chronometer certified by METAS
  • Diamond-set bezel
  • Water resistance up to 50 meters
  • 42.00 mm diameter and 13.18 mm height

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet
Reference
310.55.42.50.13.001
Movement
3861
Movement Features
  • Small Seconds, Hours, Minutes
  • Chronograph
  • Chronometer
Case
Sedna Gold 42mm
Dial Color
Brown
Crystal
Sapphire
Water Resistance
50

Current Listings

[WTS] Brand New Omega Speedmaster Moonwatch "Sapphire Sandwich" [ Ref. 310.30.42.50.01.002 ]

Brand New Omega Speedmaster Moonwatch "Sapphire Sandwich" [ Ref. 310.30.42.50.01.002 ]

Omega - 310.30.42.50.01.002 · $7,300
This listing is for a brand new Omega Speedmaster Moonwatch Professional in the 'Sapphire Sandwich' style. It comes as a full set with various accessories.

  • Condition: Brand new, unworn
  • Case size: 42mm diameter
Posted at
Apr 29, 2026, 3:46 PM
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[WTS] Omega Speedmaster Date 3513.50

Omega Speedmaster Date 3513.50

Omega - 3513.50
  • Model name: Speedmaster Date
Posted at
Apr 29, 2026, 2:36 PM
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[WTS] 2026 NEW Omega Speedmaster Reverse Panda 310.30.42.50.01.004 Unworn

2026 NEW Omega Speedmaster Reverse Panda 310.30.42.50.01.004 Unworn

Omega - 310.30.42.50.01.004 · $9,900
This new Omega Speedmaster Reverse Panda is an unworn timepiece that comes with its full set, including the box and paperwork.

  • Condition: Like New
  • Year Of Manufacture: 2026
  • Material: Stainless Steel
  • Bracelet Material: Stainless Steel
Posted at
Apr 29, 2026, 2:30 PM
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[WTS] Omega Speedmaster Reduced - 3510.50

Omega Speedmaster Reduced - 3510.50

Omega - 3510.50 · $2,495
A Omega Speedmaster Reduced in good pre-owned condition, featuring a 39mm case size and chronograph function that will require service.

  • Condition: good pre-owned condition
  • Size: 39mm diameter
Posted at
Apr 29, 2026, 1:01 PM
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[WTS] Omega Speedmaster 3519.50.00 “Schumacher World Champion 2001” LE — Racing Dial — $2,599 Shipped (Tariff Covered)

Omega Speedmaster 3519.50.00 “Schumacher World Champion 2001” LE — Racing Dial — $2,599 Shipped (Tariff Covered)

Omega - 3519.50.00 · $2,599
This Omega Speedmaster ref. 3519.50.00 'Schumacher World Champion 2001' Limited Edition features a distinctive racing dial and is powered by an automatic chronograph movement.

  • Condition: Honest condition with light signs of use
  • Case size: 39mm
  • Lug-to-lug: 44mm
  • Thickness: 14mm
Posted at
Apr 29, 2026, 12:39 PM
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[WTS] Omega Speedmaster Professional Sapphire - 310.30.42.50.01.002 - Full Kit - Price Reduced!

Omega Speedmaster Professional Sapphire - 310.30.42.50.01.002 - Full Kit - Price Reduced!

Omega - 310.30.42.50.01.002 · $6,595
This Omega Speedmaster Professional features a sapphire crystal front and display caseback, showcasing the stunning omega movement.

  • Condition: near like-new condition
  • Size: 42mm diameter
  • Kit contents: full kit with original double box, all 3 omega cards
Posted at
Apr 29, 2026, 12:25 PM
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[WTS] Omega Speedmaster Broad Arrow 44.25mm Grey Dial 321.10.44.50.02.001 $2,450

Omega Speedmaster Broad Arrow 44.25mm Grey Dial 321.10.44.50.02.001 $2,450

Omega - 321.10.44.50.02.001 · $2,450
A Omega Speedmaster with a grey dial and 44.25mm case size for sale.

  • Condition: Slight scratches from normal use
  • Diameter: 44.25mm
  • Shipping region: Singapore
  • Shipping time: 4-5 business days to US
Posted at
Apr 29, 2026, 5:48 AM
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[WTS] Omega Speedmaster Professional "Sapphire Sandwich" Ref. 3573.50 - $4,750

Omega Speedmaster Professional "Sapphire Sandwich" Ref. 3573.50 - $4,750

Omega - 3573.50 · $4,750
This Omega Speedmaster Professional features a stainless steel case, 42mm in diameter, with sapphire crystals front and back, powered by an Omega Calibre 1863 movement. It is a manual wind chronograph from approximately 2005.

  • Condition: Good condition with slight wear marks and one scratch
  • Case size: 42mm
  • Crystal material: Sapphire
  • Movement type: Manual wind chronograph
Posted at
Apr 29, 2026, 12:06 AM
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[wts] 2026 Omega Speedmaster “Reverse Panda” 310.30.42.50.01.004 $9599 + FREE SHIPPING

2026 Omega Speedmaster “Reverse Panda” 310.30.42.50.01.004 $9599 + FREE SHIPPING

Omega - 310.30.42.50.01.004 · $9,599
2026 Omega Speedmaster “Reverse Panda” with a 42mm steel case, black dial with white sundials, and a 3861 movement providing 50 hours of power reserve.

  • Condition: Preowned, 9.9/10 Cosmetic Condition
  • Case size: 42mm
  • Movement: 3861
  • Power reserve: 50 Hours
Posted at
Apr 28, 2026, 11:12 PM
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