NMK955 VK Chronograph Case: Steel Finish

For years, Seiko modding has revolved around NH mechanical movements—but with this NMK955 VK Chronograph Case, we’re shifting gears. Purpose-built for VK mecaquartz chronograph movements, this case unlocks a whole new world of modding possibilities: slimmer builds, true chronograph functions, and that satisfying snapback reset.

Inspired by the timeless silhouette of the vintage racing chronographs, the NMK955 blends classic motorsport design with modern modularity. Whether you’re building a panda dial vintage racer or a bold regatta timer, this case is the perfect foundation for your next chronograph project!

Case Specifications:
Case Diameter: 39mm
Lug Width: 18mm
Lug to Lug: 46mm
Thickness:  8.1mm (Case only)
Total thickness: 12.5mm (Case with crystal and caseback)
Dial Size: Accepts 30.5-31.5mm Dials
Dial Opening Size: 29.5mm
Water Resistance: 10ATM

What's Included?
- Pre-Assembled Boxed Crystal (Clear AR)
- Integrated Fixed Bezel and Chapter Ring (Rehaut) available in 2 Designs
- Matching Sterile Screw-down Crown and Chronographer Pushers
- Brushed Caseback and Gasket
- VK Movement Spacer
- Springbars