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
![[WTS] Omega Speedmaster Date 3211.30 40mm - $1,990](https://preview.redd.it/8dku9o07i71h1.jpg?width=640&crop=smart&auto=webp&s=17d6b0bfa1f69b2eb7ba0e670b5ea81e68588c71)
Omega Speedmaster Date 3211.30 40mm - $1,990
Up for sale is my Omega Speedmaster Date 3211.30 in great condition. This watch measures at 40mm with an automatic Omega Calibre 1164 movement.
- Condition: Very good condition for its age
- Case size: 40mm
- Bracelet length: up to 7-7.25 inches
- Shipping time: 3-5 days globally
![[WTS] OMEGA Speedmaster Professional Moonwatch 3861 Sapphire Sandwich - Latest Model - Watch Only on Forstner Bullet + Spiralwinder DON Ceramic Lumed Bezel (OEM bezel included) - $5300 shipped CONUS](https://preview.redd.it/3t3nepvz671h1.jpg?width=640&crop=smart&auto=webp&s=7c676f93ed5eefe97e4dcd6b55d14a90f97cf40a)
OMEGA Speedmaster Professional Moonwatch 3861 Sapphire Sandwich - Latest Model - Watch Only on Forstner Bullet + Spiralwinder DON Ceramic Lumed Bezel (OEM bezel included) - $5300 shipped CONUS
This is a latest model Omega Speedmaster Professional Moonwatch with an upgraded Forstner Bullet bracelet and a fully lumed ceramic Dot Over 90 bezel.
- Condition: very good
- Bracelet: Forstner Bullet
- Bezel: fully lumed ceramic Dot Over 90 bezel
- Original bezel included: yes
![[WTS] Omega Speedmaster Professional Moonwatch ref. 145.022 circa 1978 with Extract of the Archives](https://preview.redd.it/p52qs8p5671h1.jpg?width=640&crop=smart&auto=webp&s=a993ea2cc078bf01b533c092c93296d43c778477)
Omega Speedmaster Professional Moonwatch ref. 145.022 circa 1978 with Extract of the Archives
A late 1970s Omega Speedmaster Professional Moonwatch ref. 145.022 with a tritium dial, standard-issue black dot-beside-90 tachymeter bezel, and 'twisted lugs'. The watch features an in-house handwound Caliber 861 movement.
- Condition: Light wear and minimal signs of polish and wear—a few dial blemishes.
- Movement Type: in-house handwound
- Case Size: 42mm
- Lug Width: 20mm
![[WTS] Omega Speedmaster 311.30.42.30.01.005](https://preview.redd.it/vmi8eo3ry61h1.jpg?width=640&crop=smart&auto=webp&s=296233e7bb9817c4f0fe95a31cd043ac29b141f7)
Omega Speedmaster 311.30.42.30.01.005
A Omega Speedmaster 311.30.42.30.01.005 is being sold in a full big box set with additional details, and the seller notes it's in good condition.
- Condition: good
- Case size: 40mm
![[WTS] 1450 President Bracelet for Omega Speedmaster Professional 20mm - Uncle Straps / Uncle Seiko](https://preview.redd.it/3xlpd9cs161h1.jpg?width=640&crop=smart&auto=webp&s=7c7693b073ff9f7ce4972f291cf26fc578935b4a)
1450 President Bracelet for Omega Speedmaster Professional 20mm - Uncle Straps / Uncle Seiko
A Presidential/Lincoln bracelet designed for the Omega Speedmaster professional, available in two different styles to make the watch wear smaller or more dressy.
- Condition: good shape with normal desk diving scrapes on the clasps
- Lug width to buckle: 20mm to 16mm
- Length: 180mm
- Min length after adjusted: 120mm
![[WTS] Omega Speedmaster Professional Sapphire Sandwich ref.
310.30.42.50.01.002 Full Set w/ Original Receipt](https://preview.redd.it/0oqegszxx51h1.jpg?width=640&crop=smart&auto=webp&s=16cc672d28fa17ceaa15ea5f37041b8d891396da)
Omega Speedmaster Professional Sapphire Sandwich ref. 310.30.42.50.01.002 Full Set w/ Original Receipt
A great example of the classic Omega Speedmaster Professional 'Sapphire Sandwich' in 42mm size, purchased new from an Omega store.
- Condition: Near new, one owner
- Size: 42mm
- Bracelet clasp wear: Minor
- Box and papers included: Yes
![[WTS] Omega Speedmaster Moonwatch 3861 Sapphire 310.30.42.50.01.002 ( new / 2026 / box and papers )](https://preview.redd.it/jhmzbdywg51h1.jpg?width=640&crop=smart&auto=webp&s=9047042c4e1db3ce4228a216598a31fa9ef8ac57)
Omega Speedmaster Moonwatch 3861 Sapphire 310.30.42.50.01.002 ( new / 2026 / box and papers )
This Omega Speedmaster Moonwatch Professional is a brand new watch with all original packaging and papers, featuring a stainless steel case and Master Chronometer movement.
- Condition: Brand new
- Case size: 42mm diameter
- Movement type: Master Chronometer
![[WTS] Omega Speedmaster Moonwatch 3861 Hesalite 310.30.42.50.01.001 ( new / 2026 / box and papers )](https://preview.redd.it/kk2g141rf51h1.jpg?width=640&crop=smart&auto=webp&s=f0c8e76bb0ef3c0e427c3e6086c70b89bbe6fe8f)
Omega Speedmaster Moonwatch 3861 Hesalite 310.30.42.50.01.001 ( new / 2026 / box and papers )
This Omega Speedmaster Moonwatch Professional features a 42mm stainless steel case and is powered by the 3861 Omega Master Chronometer movement.
- Condition: Brand new
- Case size: 42mm diameter
- Movement: 3861 Omega Master Chronometer
- Crystal material: Hesalite
![[WTS] Omega Speedmaster '57 Manual Wound 332.10.41.51.01.001 $5,299](https://preview.redd.it/2q9pyji3851h1.jpeg?auto=webp&s=9390ca95f471e3ce46c99460ac6f5cff9eafe31d)
Omega Speedmaster '57 Manual Wound 332.10.41.51.01.001 $5,299
The Omega Speedmaster '57 is a modern watch that balances vintage charm with sophisticated technology, ideal for those who want a dressier, traveler-friendly Speedmaster.
- Condition: great condition with a few swirls on the bracelet clasp
- Case Size: 40.5mm diameter
- Lug To Lug: 49.6mm length
- Lug Width: 20mm width