Glossary · Materials
Japanese Cordovan - Shinki Hikaku - Milano Straps
Definition
Japanese cordovan from Shinki Hikaku is the absolute pinnacle in working this noble leather. It's not horse leather in the traditional sense: it's the dense inner layer from the horse's back, extracted and processed with techniques passed down through generations of master tanners. The tanning is vegetable-based, slow-process, making the leather almost alive to the touch. For a watch strap it's extraordinary: it develops a deep patina, nearly acetous, over time. It resists water and impacts like few materials, yet maintains softness that grows with wear. The colors—deep brown, burgundy, black—are natural, not painted on. Japanese craftsmanship adds a precision in finishing that historic American tanneries don't reach. On a 20mm strap for an Omega Seamaster or Rolex Datejust it's simply magnetic: the weight, solidity, effortless elegance. Shinki doesn't mass-produce: each batch shows micro-variations in color, proof of genuine workmanship.
Frequently asked questions
How do you care for a Japanese Cordovan watch strap over time?
Maintenance is minimal, but conscious. Shinki Hikaku's vegetable tanning protects naturally: avoid prolonged soaking, no aggressive waxes or oils needed. Once every six months, if heavily sun-exposed, use a soft dry brush and a small amount of cordovan-specific oil. The patina is your ally: it hides wear marks and improves aesthetics. On an 18mm strap for a vintage Rolex Datejust, the leather ages nobly, almost like fine wine.
What's the difference between Shinki Hikaku and American cordovan (Horween)?
Both are excellent, but follow different philosophies. Horween (USA) has a century of history, robust vegetable tanning, faster and brighter patina. Shinki (Japan) is even slower: 6-8 months of tanning versus Horween's 3-4 months, resulting in denser, deeper leather. On a 20mm strap for an IWC Portofino, Shinki offers a darker, 'serious' initial color that progressively brightens. Horween is more versatile; Shinki is a choice for those wanting a lifetime companion. Both develop natural creasing that speaks to authenticity.
Which watch benefits most from a Japanese Cordovan strap?
It shines on classic dress watches and elegant sports: Rolex Datejust (36-40mm, 20mm), Omega Seamaster (42mm, 20mm), Patek Philippe Calatrava (35-38mm, 18mm). Deep color exalts white porcelain or dark blue dials. Avoid heavy sports watches (diving instruments, aggressive sports): cordovan prefers formal wrists. On a 22mm strap for a vintage Rolex GMT-Master it's almost sinful: leather density handles the weight, patina emerges nobly. For vintage watchmaking (1960s-70s) it's a natural choice: restores original dignity.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only