Omega Speedmaster Speedmaster Professional Moonwatch 3861 Sedna Gold - Diamond / Brown / Bracelet
Reference 310.55.42.50.13.001
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.
Buy Now on Jomashop
This is an affiliate link
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

2020 Omega Speedmaster Ref: 522.30.42.30.03.001 Tokyo 2020 Olympics with B+P
This is a limited edition 2020 Olympics Omega Speedmaster with a blue dial and blue tachymeter bezel, featuring traditional stick markers and white sub-dials.
- Condition: Excellent
- Case size: 42mm
- Serial number: 78,8XX,XXX
- Limited edition number: 16X/2020

2024 Omega Speedmaster Ref. 310.30.42.50.04.001 with Box & Papers
The Omega Speedmaster Moonwatch is a chronograph with significant historical value, accompanied by all six moon landings and featuring a brushed stainless steel bracelet with sapphire glass and a sapphire caseback.
- Condition: Excellent (little to no signs of wear)
- Case Width: 42mm
- Strap Length: 8.00"
- Movement: Co-Axial Master Chronometer Calibre 3861

Omega Speedmaster Moonwatch 3861 - White - 310.30.42.50.04.001 ( new )
This is a brand new Omega Speedmaster Moonwatch Professional White Dial Sapphire on Bracelet, reference # 310.30.42.50.04.001.
- Condition: Brand new
- Case material: Stainless Steel
- Case size: 42mm
- Movement type: Omega Master Chronometer Movement
Omega Meteorite Speedmaster Moonphase Grey Dial Blue Bezel - Just Released!
A unique and rare Omega Speedmaster Moonphase Meteorite timepiece that combines the legendary Speedmaster design with a captivating meteorite dial, available in brand new condition.
- Condition: Brand New
- Case Size: 43mm
- Bracelet Material: stainless steel
- Movement Type: Automatic chronograph

Omega Speedmaster Professional Moonwatch 311.33.42.30.01.001
This listing is for an Omega Speedmaster Professional Moonwatch, a high-end timepiece known for its iconic design and association with space exploration.
- Condition: Excellent
- Accessories: boxes, book, velcro strap, nato strap, warranty card

Omega Speedmaster Racing - White Dial - 329.30.44.51.04.001 ( excellent )
This Omega Speedmaster Racing Master Co-Axial in White Dial is a high-end chronograph watch with a stainless steel case and Master Co-Axial movement.
- Condition: Excellent
- Case size: 44.25mm diameter
- Movement: Master Co-Axial 9900 Chronometer

>>reduced further<< vintage omega speedmaster professional pre-moon 145.022-69
This is a pre-moon Omega Speedmaster Professional reference 145.022-69ST, featuring an Omega calibre 861 movement with a 29 million serial number from 1970. The watch has been overhauled in 2022 and comes on a generic tan strap.
- Condition: Good vintage condition
- Calibre: Omega calibre 861
- Movement condition: Overhauled in 2022
- Case diameter: 42 mm
310.32.42.50.02.001 Omega Speedmaster Silver Snoopy COMPLETE SET/BRAND NEW
The Omega Speedmaster Silver Snoopy is a complete set in brand new condition, including the OEM bracelet.
- Condition: Brand new/unworn
- Bracelet Type: OEM Speedmaster Bracelet
Omega Speedmaster Professional Moonwatch CK2998 White Steel LIMITED
The Omega Speedmaster Professional Moonwatch is a limited edition model with a silver manual winding movement and a stainless steel case. It features a tachymetre bezel, sapphire crystal, and an Omega black leather band.
- Condition: Excellent
- Case material: Stainless Steel
- Case dimensions: 39.7mm diameter
- Dial color: Silver