A masterclass in packaging, the Omega Speedmaster Mk40 (Ref. 3520.50) features a 12-hour chronograph, 24-hour indicator, and full calendar in a case that wears better than standard 42mm Professional models.

• Condition: Good condition with honest wear. Small concentration of tiny pin marks on the left side of the case.
• Case Wear: left side
• Diameter: 39mm
• Lug To Lug: 44.5mm

This Omega Speedmaster Triple Calendar Mk40 Cosmos is a 39mm watch featuring a black dial and bezel, powered by the Omega 1151 Caliber. It includes day, date, and month functions, making it a versatile and wearable timepiece.

• Condition: Fair user condition with light scratches on case and bracelet
• Case size: 39mm
• Lug-to-lug length: 44.75mm
• Bracelet size range: up to 6.75"

This Omega Speedmaster Triple Date features a black dial with tritium markers, triple calendar, and moonphase functionality. The watch is powered by an automatic chronograph movement and comes in a stainless steel case.

• Condition: Very good overall condition with light, honest wear on case
• Case diameter: 39mm
• Lug width: 18mm
• Crystal type: Sapphire, AR coated

A Omega Speedmaster 3520.53 Full Kit is being sold in good condition with an automatic movement and a steel case.

• Condition: Good condition with some usage marks and minimal oxidation
• Case Size: 39mm diameter
• Water Resistance: Not specified
• Movement Type: Automatic

This Omega Speedmaster Triple Calendar Mk40 Cosmos features a 39mm case size, black dial, and bezel, powered by the Omega 1151 Caliber. It has a day, date, and month function.

• Condition: Fair user condition
• Case size: 39mm
• Lug-to-lug: 44.75mm
• Bracelet size: fits up to 6.75"

This is a Omega Speedmaster 3520.53 Full Kit in good condition, featuring an automatic movement and a steel case on an original Omega Steel bracelet.

• Condition: Good condition with usage marks and minimal oxidation on subdials
• Case size: 39mm
• Bracelet size range: 7.25-7.5 inch wrists
• Movement type: Automatic

Up for sale is my Omega Speedmaster 3520.53 Full Kit, measuring 39mm with an automatic movement and a steel case on an original Omega Steel bracelet.

• Condition: good condition with usage marks and some patina
• Size: 39mm diameter
• Case material: steel
• Bracelet size range: fits up to 7 inch wrists with extra links available

A 39mm Omega Speedmaster Triple Date in great condition, perfect as a daily wearer.

• Condition: Preowned
• Case size: 39mm
• Bracelet condition: Light wear

The Omega Speedmaster Triple Day Date features a busy yet legible dial coupled with the unmistakable Speedmaster design language and runs on the Omega 1151, Valjoux 7751 triple-date automatic chronograph.

• Condition: Preowned - Good
• Case diameter: 39mm