Strap for Ichimonji Stainless Steel / Black

The ICH-001 features 20.00 mm lug width. This measurement, less common than standard 18 mm or 22 mm options, is a deliberate choice by Kikuchi Nakagawa that emphasises the proportional balance of the 36.80 mm case diameter. To verify: position a digital calliper perpendicularly between the inner edges of both lugs and read the millimetre value.

The choice depends on intended use and aesthetic preference. Alligator leather in brown or black imparts formality and nobility. Vegetable-tanned calf develops a patina over time and offers versatility. NATO in cotton grey-blue introduces casual urban style. FKM rubber in black suits humid or professional environments. We recommend evaluating your primary wardrobe and intended seasons of wear.

Use a spring bar tool, positioning the pin at the internal spring mechanism of each lug. Apply gentle inward pressure towards the case, sliding the spring back on itself until the pin disengages from its seat. Remove the old strap, align the new strap's eyelet with the pin, and allow the spring to return to its original position, securing the strap. Proceed with care to avoid scratching the case.

Yes, any quality strap with 20 mm lug width is compatible. Verify that thickness does not exceed 4–5 mm at the lug-entry point, otherwise fit issues or accelerated wear may occur. Full-grain leather straps are generally suitable. We recommend straps from specialised manufacturers that guarantee precise tolerances.

Longevity depends on tannage method and daily use intensity. A quality alligator or vegetable-tanned calf strap typically lasts 3–5 years with moderate wear. Direct sunlight exposure, moisture and perspiration shorten lifespan. To extend strap life, air it regularly, keep it away from heat sources, and condition it with natural waxes every 6–12 months. A well-maintained strap can reach 7–10 years of service.