Omega Speedmaster Speedmaster Professional Moonwatch 3861 Stainless Steel - Sedna Gold / Pink
Reference 310.20.42.50.99.001
About this watch
The Omega Speedmaster Professional Moonwatch 310.20.42.50.99.001 is a stunning blend of tradition and innovation, featuring a unique Sedna Gold and pink finish. Its 42mm stainless steel case and Sedna Gold accents command attention, while the remarkable Omega caliber 3861 movement boasts a co-axial escapement, reducing friction for enhanced accuracy and longevity. Certified by METAS as a Master Chronometer, this watch can resist magnetic fields reaching an impressive 15,000 gauss. The sunburst pink finish adds sophistication, making it perfect for both casual and formal settings.
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Key Features
- Omega caliber 3861 movement
- 42mm stainless steel case
- Sedna Gold accents
- Co-axial escapement
- Master Chronometer certified by METAS
- 50m water resistance
- Chronograph function
Specifications
- Brand
- Omega
- Family
- Speedmaster
- Model
- Speedmaster Professional Moonwatch 3861 Stainless Steel - Sedna Gold / Pink
- Reference
- 310.20.42.50.99.001
- Movement
- 3861
- Movement Features
-
- Small Seconds, Hours, Minutes
- Chronograph
- Chronometer
- Case
- 42mm
- Dial Color
- Pink
- Crystal
- Sapphire
- Water Resistance
- 50
Current Listings
![[WTS] Omega Speedmaster “Ed White” Cal. 321 Tropical Dial Heavy Patina (Serviced)](https://preview.redd.it/4j1mey6a1uag1.jpg?width=640&crop=smart&auto=webp&s=72bb66fb03c4b968505bd4371b3a7f2ba360e670)
Omega Speedmaster “Ed White” Cal. 321 Tropical Dial Heavy Patina (Serviced)
This Omega Speedmaster Ed White Ref. 105.003-65 is a historic variant with a stunning brown tropical dial and matching tritium hands. It's one of the most collectible Speedmasters among enthusiasts due to its unique features and significance in Omega's history.
- Condition: Very good condition, with signs of previous polish
- Size: 39mm diameter
- Year: 1965
- Movement serviced: Yes, professionally serviced in July 2023
![[WTS] Omega Speedmaster Pro Moon Watch 3570.50 W/1498/840 Bracelet (Watch Only) $3800](https://preview.redd.it/fjot2jzxvtag1.jpeg?auto=webp&s=ab7ac235cc83995fa88d955f8bd64302ece739ef)
Omega Speedmaster Pro Moon Watch 3570.50 W/1498/840 Bracelet (Watch Only) $3800
This Omega Speedmaster Pro Moon Watch is being sold in pre-owned condition, with some marks on the hesalite crystal.
- Condition: PRE-OWNED
- Case size: 42MM
- Box: NO
- Card/papers: NO
![[WTS] Omega Speedmaster Professional 42mm “Sapphire Sandwich” 310.30.42.50.01.002 - 11/2025 Complete Set](https://preview.redd.it/vnn414eqpsag1.jpg?width=640&crop=smart&auto=webp&s=5534bbf300c79cd8f3ebc40c9a13858961aafb05)
Omega Speedmaster Professional 42mm “Sapphire Sandwich” 310.30.42.50.01.002 - 11/2025 Complete Set
This is a brand new Omega Speedmaster Professional 'Sapphire Sandwich' 42mm watch, coming with a complete set including the watch itself, 11/2025 card, triple-boxed packaging, serial tag, manual, and Master Chronometer certification.
- Condition: Like New
- Case size: 42mm
- Depth rating: 30m
- Service history: Unknown
![[WTS] 2025 Omega Speedmaster Professional “Sapphire Sandwich” Moonwatch – Latest Model, MINT OPEN BOX CONDITION – Ref. 310.30.42.50.01.002 – COMPLETE SET – USA Warranty thru Aug 2030 – $6,900 FIRM net + 🏷️ within CONUS ($9000 MSRP)](https://preview.redd.it/fckv6t3nisag1.jpg?width=640&crop=smart&auto=webp&s=892793c3d1070f520a85374908689d1575d10acf)
2025 Omega Speedmaster Professional “Sapphire Sandwich” Moonwatch – Latest Model, MINT OPEN BOX CONDITION – Ref. 310.30.42.50.01.002 – COMPLETE SET – USA Warranty thru Aug 2030 – $6,900 FIRM net + 🏷️ within CONUS ($9000 MSRP)
The Omega Speedmaster Professional 'Sapphire Sandwich' Moonwatch is the latest generation with a Master Chronometer movement.
- Condition: Mint open box condition, worn twice
- Movement: Omega 3861 Master Chronometer
- Crystal: sapphire crystal front and exhibition sapphire caseback
- Case Size: 42mm diameter
![[WTS] Omega Speedmaster Reduced 3510.50 – Papers & extra Uncle Seiko bracelet](https://preview.redd.it/30dgcxnnsrag1.jpg?width=640&crop=smart&auto=webp&s=518de674a0a1a6ec6611bca8abcb3d834cd6f24d)
Omega Speedmaster Reduced 3510.50 – Papers & extra Uncle Seiko bracelet
Up for sale is my Omega Speedmaster Reduced ref. 3510.50, a classic automatic Speedmaster in great overall condition.
- Condition: Very good, with normal light wear consistent with use
- Case size: 39mm diameter
- Movement: Automatic chronograph
- Year: 2005
![[WTS] [EU] Omega Speedmaster Professional 145.022](https://preview.redd.it/l0za8bqt8qag1.jpg?width=640&crop=smart&auto=webp&s=57c449379d89a032b59c6a108e8812dadcec6fed)
[EU] Omega Speedmaster Professional 145.022
This Omega Speedmaster Professional is a pre-owned watch in poor condition. The hesalite crystal is badly scratched, and the case and strap are worn out. The chronograph function is not working.
- Condition: Bad
- Service history: No service history
- Chronograph buttons: Bottom button presses in, top button does not press in
- Movement untouched: Minimum 40-50 years since last opened
![[WTS] Omega Speedmaster Professional Moonwatch Full Steel 145.022-69 Ghost Bezel Yellow Patina Step Dial 1969 (Serviced) 🔥](https://preview.redd.it/ah9sns4x5pag1.jpg?width=640&crop=smart&auto=webp&s=a7ace6b1e1d3927887325f8ed7a83f5997fca072)
Omega Speedmaster Professional Moonwatch Full Steel 145.022-69 Ghost Bezel Yellow Patina Step Dial 1969 (Serviced) 🔥
A classic 1969 Omega Speedmaster Moonwatch featuring the step dial and flat case back, presenting beautifully in full steel with a warm yellow patina and grey 'ghost' bezel.
- Condition: Serviced, lightly polished case with original step dial and tritium lume
- Size: 42mm
- Year: 1969
- Movement serviced: true
![[WTS] Omega Speedmaster Racing “Blue Dial” 40mm 326.30.40.50.03.001 | 2022 Box and Papers](https://preview.redd.it/ganctj2pdoag1.jpg?width=640&crop=smart&auto=webp&s=25feb16dba9bd67655bc025c2993a929cc216fd4)
Omega Speedmaster Racing “Blue Dial” 40mm 326.30.40.50.03.001 | 2022 Box and Papers
2022 Omega Speedmaster Racing "Blue Dial" 40mm watch with slight wear on the bracelet, sold in its original 2022 box and papers.
- Condition: Excellent Pre-Owned Condition
- Bracelet links: 12 full links, couple half links
- Amp hours: 350
![[WTS] OMEGA_Co-Axial_Speedmaster_Racing_326.30.40.50.01.002_Reverse_Panda](https://preview.redd.it/r6tgwi5ksmag1.jpg?width=640&crop=smart&auto=webp&s=3a20587d97807e7e13673dd6602c27f9d74dbbed)
OMEGA_Co-Axial_Speedmaster_Racing_326.30.40.50.01.002_Reverse_Panda
A pre-owned OMEGA Co-Axial Speedmaster Racing watch in good condition, featuring a reverse panda dial. It comes with original authentication cards and an aftermarket box.
- Condition: Pre-Owned, typical desk diving marks, scuffs on the clasp
- Water Resistance: 30m
- Strap Type: Leather, Hirsch
- Buckle Type: Authentic 18mm OMEGA