• NANO・UNIVERSE SPECIAL EDITION (JDM): An exclusive collaboration with the prestigious Japanese fashion brand nano・universe, released exclusively for the Japanese Domestic Market (JDM). A collector’s item with a distinctive signature design.
• NATURAL MOTHER-OF-PEARL DIAL: An elegant dial crafted from genuine mother-of-pearl that offers subtle, organic iridescent reflections when held up to the light. As it is a natural material, each dial features a unique and one-of-a-kind pattern.
• ULTRA-THIN RECTANGULAR SILHOUETTE: A classic rectangular case with an ultra-slim profile, measuring just 4.9 mm thick and 18.9 mm wide. A minimalist timepiece with a vintage aesthetic that sits lightly and elegantly on the wrist.
• SEIKO RELIABILITY AND PRECISION: Equipped with the in-house 4N30 quartz caliber, ensuring excellent timekeeping accuracy and optimal long-term performance without the need for constant adjustments.
• BUILT-IN ANTI-MAGNETIC PROTECTION: Designed to be resistant to magnetic fields, ensuring the movement operates with minimal mechanical deviations despite daily exposure to smartphones, laptops, and bags with magnetic closures.

Long Description

The Seiko Selection × nano・universe SSEH025 is a refined dress watch that seamlessly combines Seiko’s technical heritage with the contemporary and chic vision of the Japanese fashion house nano・universe. Originally designed exclusively for the Japanese domestic market, this model stands out for its timeless aesthetic inspired by classic high-end timepieces with a rectangular silhouette.

Its main appeal lies in the carefully selected mother-of-pearl dial, whose hues capture light in a three-dimensional way, lending a unique sophistication to the analog design. The polished stainless steel case boasts exceptionally compact proportions: at 18.9 mm wide and an ultra-flat profile of 4.9 mm thick, the watch functions as a minimalist bracelet that is extremely comfortable for everyday wear or formal occasions.

To ensure durability and practicality for daily use, the SSEH025 features a highly resistant Hardlex crystal and a beautiful brown genuine cowhide leather strap that ages with distinction. Its Japanese 4N30 quartz movement offers maximum reliability, backed by 3-bar water resistance (suitable for everyday splashes) and an anti-magnetic structure that protects the movement’s accuracy from everyday electronic devices. A must-have piece for those seeking exclusivity, discretion, and the unmistakable charm of JDM design.

Technical Specifications

Feature Detail

Brand Seiko

Collection Seiko Selection – nano・universe Special Edition

Reference JDM SSEH025 (Exclusively Imported from Japan)

Gender Women’s / Ladies

Movement Type Japanese Quartz

Caliber 4N30 (Seiko In-house)

Case Shape Rectangular (Tank style)

Case Material High-quality stainless steel

Case Dimensions 18.9 mm (Width) × 4.9 mm (Thickness)

Dial Type: Analog, Natural Mother-of-Pearl

Hardlex Crystal

Strap Material: Genuine Cowhide Leather

Strap Color: Brown with Matching Stitching

Water Resistance: 30 meters (3 bar / Splash-resistant)

Magnetic Resistance: Yes (Built-in anti-magnetic protection)