Omega Speedmaster Speedmaster Professional Moonwatch SpeedyMoon

Reference ST 345.0809

About this watch

The Omega ST 345.0809 Speedmaster Professional Moonwatch SpeedyMoon is a true masterpiece in the world of horology, blending history, functionality, and style. With its iconic design and unique moonphase complication, it's more than just a timepiece; it's a celebration of human achievement and a testament to Omega's craftsmanship. The watch features a reliable hand-wound movement with 17 jewels and a power reserve of 45 hours, making it suitable for everyday wear and special occasions. Its durable stainless steel construction and comfortable wearability with customizable straps make it a perfect choice for those who appreciate both elegance and functionality. Whether you're a seasoned collector or just starting your watch journey, this watch offers something truly special.
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Key Features

  • Hand-wound Omega caliber 866 movement
  • Unique moonphase complication
  • 42mm stainless steel case with tachymeter bezel
  • Plexi glass crystal with water resistance up to 50m
  • Stick and dot indexes on black dial
  • Comfortable wearability with customizable straps

Specifications

Brand
Omega
Family
Speedmaster
Model
Speedmaster Professional Moonwatch SpeedyMoon
Reference
ST 345.0809
Movement Features
  • Hours, Minutes, Small Seconds
  • Date
  • Chronograph
  • Moonphase
Case
Stainless Steel 42mm
Dial Color
Black
Crystal
Plexi
Water Resistance
50

Current Listings

[WTS] Omega Speedmaster Professional Bracelet

Omega Speedmaster Professional Bracelet

Omega - 3570.50 · $550
A Speedmaster Professional from Omega with a 1998/849 bracelet, featuring a 20mm end link and full links included.

  • Condition: Great condition
  • Bracelet type: Omega Speedmaster 1998/849
  • End link size: 20mm
Posted at
May 17, 2026, 4:41 PM
Active
[WTS] Omega Speedmaster Mark II. 327.10.43.50.01.001.

Omega Speedmaster Mark II. 327.10.43.50.01.001.

This Omega Speedmaster Mark II is a large watch that fits well on the wrist. It's in very good condition and comes with additional photos available upon request.

  • Condition: very good
  • Shipping: NJ USA
Posted at
May 17, 2026, 2:51 PM
Active
[WTS] Omega Speedmaster. 39mm. Special Dial.

Omega Speedmaster. 39mm. Special Dial.

This Omega Speedmaster features a 39mm automatic movement and a special dial with a gorgeous texture.

  • Diameter: 39mm
Posted at
May 17, 2026, 2:50 PM
Active
[WTS] Omega Speedmaster Pink Numerals Mother of Pearl Dial Automatic Chronograph – Ref. 3834.74.34 – Full Set – 2012 - Mint

Omega Speedmaster Pink Numerals Mother of Pearl Dial Automatic Chronograph – Ref. 3834.74.34 – Full Set – 2012 - Mint

Omega - 3834.74.34 · $3,490
A timeless classic from Omega's Speedmaster collection, featuring a refined and versatile take on the iconic design with a 38mm case size.

  • Condition: Very good
  • Case Size: 38mm diameter
  • Movement Type: Automatic chronograph
  • Crystal Material: Sapphire
Posted at
May 17, 2026, 2:29 PM
Active
[WTS] Omega Speedmaster Professional Moonwatch Black Dial 42mm 2026 Box & Papers - Like New

Omega Speedmaster Professional Moonwatch Black Dial 42mm 2026 Box & Papers - Like New

  • Condition: Excellent
  • Size: 42mm diameter
  • Water Resistance: 50m depth rating
  • Movement: Omega manual wind chronograph movement
Posted at
May 17, 2026, 2:26 PM
Active
[WTS] Omega Speedmaster Olympic Collection Chronograph “Olympic Timeless Collection” Ref. 3836.70.36 | Rare Mother-of-Pearl Dial with Olympic Ring Numerals | 2012 Mint Condition Full Set

Omega Speedmaster Olympic Collection Chronograph “Olympic Timeless Collection” Ref. 3836.70.36 | Rare Mother-of-Pearl Dial with Olympic Ring Numerals | 2012 Mint Condition Full Set

Omega - 3836.70.36 · $3,750
A collectible Omega Speedmaster Olympic Collection Chronograph with a rare mother-of-pearl dial featuring colorful Arabic numerals inspired by the Olympic rings, blending the playful spirit of the Olympics with the timeless DNA of the Speedmaster line.

  • Condition: Mint Condition
  • Case size: 35.5mm
  • Movement: Omega Caliber 3220 automatic chronograph with 40-hour power reserve
  • Dial type: Mother-of-pearl with Olympic ring numerals
Posted at
May 17, 2026, 2:04 PM
Active
[WTS] Omega Speedmaster Professional 18k Sedna Gold

Omega Speedmaster Professional 18k Sedna Gold

a luxury sports watch designed for astronauts, part of the iconic Speedmaster collection

  • Material: 18k Sedna Gold
Posted at
May 17, 2026, 9:54 AM
Active
[WTS] Omega OEM 20mm Blue/Red Fabric Strap & 18mm Steel Deployant Clasp for Speedmaster/Snoopy - Like New

Omega OEM 20mm Blue/Red Fabric Strap & 18mm Steel Deployant Clasp for Speedmaster/Snoopy - Like New

This is a blue reinforced fabric strap with white contrast stitching, paired with an authentic Omega stainless steel deployant clasp. It's designed for Speedmasters, especially the Snoopy model.

  • Condition: Like new
  • Lug width: 20mm
  • Taper size: 18mm
  • Material: stainless steel
Posted at
May 17, 2026, 9:51 AM
Active
[WTS] OEM Omega Speedmaster White NASA Velcro Strap - Like New

OEM Omega Speedmaster White NASA Velcro Strap - Like New

This is an official Omega Boutique accessory designed to honor the Moonwatch's space exploration heritage, featuring a blue NASA logo and polished steel loop.

  • Condition: Like New
  • Lug Width: 20mm
  • Fits: standard 42mm Speedmaster Professional models
Posted at
May 17, 2026, 9:44 AM
Active