Seiko Automatic 6R55 39.5mm – 72-Hour Power Reserve

Short Description

Built for everyday reliability and versatile wear, this Seiko automatic watch combines a compact 39.5mm stainless steel case with the dependable Caliber 6R55 automatic movement and an impressive 72-hour power reserve. A curved sapphire crystal, 200-metre water resistance, LumiBrite details, and an inner rotating countdown bezel complete its practical yet refined design.

Product Description

Designed for those who appreciate mechanical performance in a comfortable, wearable size, this Seiko automatic timepiece pairs thoughtful proportions with serious everyday capability.

At its heart is Seiko’s Caliber 6R55 automatic movement, offering both automatic and manual winding along with approximately 72 hours of power reserve. This extended three-day reserve makes it especially convenient for rotating between watches without having to reset the time after a short break from the wrist.

The stainless steel case measures 39.5mm in diameter and just 44.5mm lug-to-lug, creating a balanced profile that works particularly well across a wide range of wrist sizes. Seiko’s super-hard coating provides additional protection against everyday wear, while the curved sapphire crystal features an anti-reflective coating on the inner surface for improved visibility.

For added functionality, the watch includes an inner rotating ring with a countdown scale, allowing elapsed or remaining time to be tracked easily. LumiBrite is applied to the hands and indexes for enhanced visibility in darker environments.

With 20 bar / 200 metres of water resistance, a secure three-fold clasp with push-button release, and a versatile 20mm lug width, this is a capable automatic watch designed for both everyday use and more active wear.

Key Features

• Seiko Caliber 6R55 automatic movement
• Automatic winding with manual winding capability
• Approx. 72-hour / 3-day power reserve
• 39.5mm stainless steel case
• Super-hard case coating
• Compact 44.5mm lug-to-lug measurement
• Curved sapphire crystal
• Inner anti-reflective crystal coating
• 200m / 20 bar water resistance
• Inner rotating countdown ring
• LumiBrite hands and indexes
• Three-fold clasp with push-button release
• Stop-seconds function
• 20mm lug width

Specifications

Movement
Caliber: 6R55
Movement Type: Automatic with manual winding
Power Reserve: Approx. 72 hours
Accuracy: +25 to -15 seconds per day
Jewels: 24
Functions: Stop-seconds function

Case & Crystal
Case Material: Stainless steel with super-hard coating
Case Diameter: 39.5mm
Case Thickness: 12.0mm
Lug-to-Lug: 44.5mm
Lug Width: 20mm
Crystal: Curved sapphire crystal
Crystal Coating: Anti-reflective coating on inner surface

Dial & Visibility
LumiBrite: Hands and indexes

Bracelet & Clasp
Clasp: Three-fold clasp with push-button release

Water & Magnetic Resistance
Water Resistance: 20 bar / 200 metres
Magnetic Resistance: 4,800 A/m

Additional Features
Inner rotating ring with countdown scale
Screw case back