Omega Speedmaster Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Bracelet
Reference 310.30.42.50.01.001
About this watch
The Omega Speedmaster Professional Moonwatch 3861 is a masterpiece that combines timeless elegance with modern technology. Founded in 1848, Omega has been a pillar in the world of horology, synonymous with precision and innovation. From its stunning design to its robust functionality, it encapsulates the spirit of adventure and precision that Omega is known for. The Speedmaster line has always been a favorite, and the 3861 model is no exception. With a diameter of 42 mm, the stainless steel case provides both durability and a polished aesthetic. The tachymeter bezel allows for speed calculations over a known distance, making it not just a pretty face but a functional tool. At the heart of the Speedmaster Professional Moonwatch is the Omega Caliber 3861, a hand-wound movement that's a modern upgrade from previous models, incorporating a co-axial escapement and a silicon balance spring. The craftsmanship is evident in the intricate details of the movement, which you can admire through the closed case back.
Key Features
- Stainless steel case with black matte finish
- 42 mm diameter for a refined yet statement-making size
- Plexi glass for added durability and shock resistance
- Master Chronometer certification by METAS for accuracy and reliability
- Hand-wound Omega Caliber 3861 movement with co-axial escapement and silicon balance spring
- Chronograph function with small seconds, hours, and minutes
- Water resistance of 50 meters for everyday wear
Specifications
- Brand
- Omega
- Family
- Speedmaster
- Model
- Speedmaster Professional Moonwatch 3861 Stainless Steel / Black / Plexi / Bracelet
- Reference
- 310.30.42.50.01.001
- Movement
- 3861
- Movement Features
-
- Small Seconds, Hours, Minutes
- Chronograph
- Chronometer
- Case
- Stainless Steel 42mm
- Dial Color
- Black
- Crystal
- Plexi
- Water Resistance
- 50
Current Listings
![[WTS] 🚀🌗Brand New 2026 Full Set - Omega Speedmaster Moonphase Reference: 304.30.44.52.01.001 🚀🌗](https://external-preview.redd.it/dTdkeWlycGtwdXdnMY-gtVw_zHCO2_RK8gre-2vz3D5bZNzmPehEUxC3MfzG.png?format=pjpg&auto=webp&s=7b627013870db06fcc229e3eb7cc2e849323a777)
🚀🌗Brand New 2026 Full Set - Omega Speedmaster Moonphase Reference: 304.30.44.52.01.001 🚀🌗
The Omega Speedmaster Moonphase is a brand new, full set model from 2026.
- Condition: Brand New
- Msrp: 13000
- Shipping: fully insured to nearest FedEx Office for signature pickup
![[WTS] OMEGA SPEEDMASTER DATE 3513.50 WITH PAPERS](https://preview.redd.it/cya4uqh97uwg1.jpg?width=640&crop=smart&auto=webp&s=860e67c17ef4ea55d23d7f5651038d700d8c6f14)
OMEGA SPEEDMASTER DATE 3513.50 WITH PAPERS
A lightly worn Omega Speedmaster Date with a dated card, extra link, and no box.
- Condition: lightly worn
- Diameter: 40mm
![[wts] 2023 OMEGA SPEEDMASTER PROFESSIONAL
310.30.42.50.01.002
$6499](https://preview.redd.it/c647xp73rtwg1.jpg?width=640&crop=smart&auto=webp&s=9f1a1eda8fc32ca7df72e93b10c68ee2fcd3de47)
2023 OMEGA SPEEDMASTER PROFESSIONAL 310.30.42.50.01.002 $6499
2023 OMEGA SPEEDMASTER PROFESSIONAL with manual wind movement and sapphire crystal. Features a 42mm case size and 50 hour power reserve.
- Condition: Pre owned, cosmetic condition 9/10
- Case size: 42mm diameter
- Bracelet: tapered stainless steel with micro adjustments
- Movement: manual wind 3861
![[WTS] 2021 OMEGA SPEEDMASTER PROFESSIONAL
310.30.42.50.01.002](https://preview.redd.it/c5173q9hjtwg1.jpg?width=640&crop=smart&auto=webp&s=89f675055c882d2fde6b7411f125db4990bad424)
2021 OMEGA SPEEDMASTER PROFESSIONAL 310.30.42.50.01.002
2021 OMEGA SPEEDMASTER PROFESSIONAL features a manual wind movement, 50 hour power reserve, and 42mm case size. It also comes with a sapphire crystal and 50 meters water resistance.
- Condition: Pre owned, cosmetic condition 7/10
- Case size: 42mm diameter
- Bracelet material: tapered stainless steel
- Movement: manual wind 3861
![[WTS] Omega Speedmaster Professional "Sapphire Sandwich" (Ref. 310.30.42.50.01.002)/Full set](https://preview.redd.it/mggkhnisqswg1.jpg?width=640&crop=smart&auto=webp&s=86c573acca1fdc289bb96fa9d1f88667fe4ae0e6)
Omega Speedmaster Professional "Sapphire Sandwich" (Ref. 310.30.42.50.01.002)/Full set
This Omega Speedmaster Professional, also known as the Sapphire Sandwich, is a manual-wind watch with a Master Chronometer movement and features a stunning Caliber 3861 movement visible through an exhibition caseback.
- Condition: pristine
- Purchase Price: 9000
- Dimensions: 42mm diameter, 20mm lug width
- Bracelet Type: tapered
![[WTS] 3510.50 Omega Reduced Speedmaster Excellent vintage condition with original warranty card Serviced recently](https://preview.redd.it/iynqks9o4swg1.jpg?width=640&crop=smart&auto=webp&s=8897e5365de51e5712a274bc4ac209f3c69490b8)
3510.50 Omega Reduced Speedmaster Excellent vintage condition with original warranty card Serviced recently
This is a 26-year-old Omega Reduced Speedmaster in excellent vintage condition, with original warranty card and recently serviced movement.
- Condition: Excellent vintage condition
- Warranty card: Original warranty card included
- Movement serviced: Recently serviced movement
![[WTS] Omega Speedmaster Date Chronometer 3210.50.00 — Cal. 1164 (Serviced) — $2,099 Shipped (Tariff Coverd)](https://preview.redd.it/ka2xqc4g1swg1.jpg?width=640&crop=smart&auto=webp&s=e188a2a64929c521776819fafa70cba4b86b121b)
![[WTS] Omega Speedmaster Professional 🌘 Moonwatch 🌒 Sapphire Sandwich LNIB 9/25](https://preview.redd.it/0u4carhalrwg1.jpg?width=640&crop=smart&auto=webp&s=360ecc092648606031b27924692bda836043806d)
Omega Speedmaster Professional 🌘 Moonwatch 🌒 Sapphire Sandwich LNIB 9/25
A Omega Speedmaster Professional in like new condition with a sapphire sandwich case and reference number 310.30.42.50.01.002.
- Condition: Like new
- Missing items: outer box, user's manual, Moonwatch booklet, outer pillow
![[WTS] Omega Speedmaster Professional Reverse New Apr 2026, $10.2k](https://preview.redd.it/8gknzybczqwg1.jpg?width=640&crop=smart&auto=webp&s=8a4a2de1ca7e9b458516d0a3d4c8ed0f31c92dfa)
Omega Speedmaster Professional Reverse New Apr 2026, $10.2k
This Omega Speedmaster Professional Reverse is a brand new watch with a reference number of 310.30.42.50.01.004, coming with its original box and April 2026 warranty.
- Condition: Brand New
- Shipping cost: $200 for USA shipping
- Payment methods: Wire or Credit Card (+4.9% and 4 days clearance)
- Warranty: Apr 2026 warranty