nano universe x Seiko Collaboration Solar Wristwatch Brown Leather HFJ003P

The nano universe × Seiko Collaboration Solar Watch — Brown Leather (HFJ003P) is a 2026 Autumn/Winter collaboration between nano universe and Seiko. The warmest colourway in the series: a pink gold-plated case against a brown genuine leather band. Where the Black Leather model reads contrast, the Brown Leather model reads harmony — pink gold and brown leather occupy the same warm register, a combination that sits naturally against autumn and winter clothing.

The case is stainless steel with pink gold-colour plating, 27mm x 18mm, Roman numeral dial. The band is genuine cowhide leather in brown, adjustable from 11.5cm to 15.5cm. Solar movement, Japanese caliber, assembled in China. Daily life water resistance.

Key Features:

• Pink Gold x Brown — Pink Gold-Plated Case, Brown Leather Band: The warmest colourway in the nano universe x Seiko series. Pink gold-plated stainless steel against brown genuine leather — both materials in the same warm register, a combination that reads feminine and refined without effort. The only model in the series with pink gold plating.
• Genuine Cowhide Leather Band — 11.5–15.5cm Wrist Range: Brown genuine leather band for wrists from 11.5cm to 15.5cm. The leather band gives a softer wearing experience than the metal bracelet models — quieter on the wrist and more comfortable in autumn and winter layering contexts.
• Seiko Solar — Japanese Movement, No Battery Replacement, ±15 sec/month: Solar caliber, Japanese movement, assembled in China. Charges from light; no battery replacement. ±15 seconds per month accuracy.