Glossary · Materials
Sully - Alran Leather - Milano Straps
Definition
Sully is our Alran reference for those seeking a robust and versatile watch strap leather. It's a chrome-tanned skin, naturally oily, with a marked and uniform grain that almost resembles a textile texture. When you choose it for a strap, you immediately appreciate its solidity: not delicate like Barenia, but not fragile either. The surface carries that natural protective patina characteristic of quality French chrome-tanned leathers. Over time it develops a subtle sheen without becoming showy. It's the right choice if you want a strap that withstands daily use without requiring excessive maintenance, while preserving that aesthetic rigor distinguishing craftsmanship. Perfect on robust sport watches and dress watches, from 18 to 22mm. Alran remains an excellence in tanning, and this leather proves it: French reliability, Italian constructive sensibility.
Frequently asked questions
Which watches does a Sully strap suit best?
Sully excels on Rolex Explorer, Omega Seamaster 300M, IWC Pilot's Watch 41mm, Patek Philippe Aquanaut. Its robustness makes it ideal for sport watches requiring a reliable strap. It also works masterfully on vintage Heuer or Tudor. Not the choice for minimalist dress watches, but for timepieces that demand character.
How does Sully leather age over time?
Unlike Barenia, Sully doesn't develop a dramatic patina. What you see is a progressive controlled drying and subtle natural polishing. It maintains its grain without becoming opaque. If you treat it with light conditioner every 12-18 months, it remains in optimal condition for years. It doesn't fear water as much as other chrome tanned leathers, but still avoid prolonged exposure.
What's the difference between Sully and other Alran leathers for straps?
Alran offers various finishes. Sully is the most versatile: not too formal, not too casual. It's our balance for those who want no compromises between aesthetics and practicality. Compared to softer leathers, Sully holds its shape better; compared to stiffer leathers, it welcomes the wrist without penalties. It's the leather I choose for the watches I actually wear.
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