Glossary · Materials
Teju
Definition
Teju — Tupinambis merianae, the silver lizard from South America — has larger scales compared to other lizards used in leather goods, with a geometric diamond pattern that is immediately recognisable. It is the lizard leather with the most visual presence: it does not get confused with Nile monitor, it does not hide. Those who choose teju want the material to be seen. Teju leather is thicker than other lizards — this makes it easier to work with and more durable over time. The scales hold up to use better than those of karung or finer lizards, and the strap keeps its shape for longer. It is not the thinnest leather, but it is the most practical among lizards. I work with CITES-certified teju, sourced from controlled farms in Argentina and Brazil. Vegetable tanning enhances the geometric pattern of the scales and produces a warm sheen that intensifies over time. Chrome tanning evens out the texture — the character is lost. For pairing: black teju on a Cartier Tank or an 18mm JLC Reverso is the classic formal choice. Chocolate brown teju on a 1960s-70s vintage with a gilt dial is my favourite — the texture of the scales dialogues with the watch's patina in a way no other leather manages. Forest green teju on a contemporary watch is for those who are not afraid of colour.
Frequently asked questions
What is the difference between teju and Nile monitor?
Teju (Tupinambis merianae) has larger scales with a geometric diamond pattern — more visible, more distinctive. Nile monitor (Varanus niloticus) has much smaller, denser scales, an almost silky texture, a finer and more discreet appearance. For those who want the leather to be seen, teju. For those who want something thinner and more refined, monitor.
Is teju more resistant than other lizards?
Yes — the larger scales and greater thickness make teju sturdier than karung or monitor. It is easier to work with and more durable in daily use. It is not a leather for sport or physical activities, but for a dress watch or an elegant watch worn in rotation, teju holds up very well over time.
Which watches do I pair teju with?
Black teju on a Cartier Tank or an 18mm JLC Reverso is the classic formal choice. Chocolate brown on a 1960s-70s vintage with a gilt dial is my favourite pairing — the geometric scales dialogue with the watch's patina in a unique way. Forest green on a contemporary watch is for those who are not afraid of colour. I avoid teju on sports watches.
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
The atelier's website: casatimilano.com
