Strap for OT-13 Lucie

The Dietrich OT OTCAO13 features a 20mm lug width, measured internally between the two lugs of the case. This dimension ensures optimal proportional balance on a 46mm timepiece. Respecting this measurement is critical to avoid play or excessive tension when installing a strap.

For the non-conformist design of the OTCAO13, we recommend a natural alligator leather strap or vegetable-tanned calf leather. Alligator amplifies the marked geometry of the dial, whilst vegetable-tanned calf develops a patina parallel to the stainless steel case. For a more industrial aesthetic, an FKM rubber or canvas NATO strap maintains the contemporary character of the watch.

To change the 20mm strap on the OTCAO13, use a spring bar tool or a rigid credit card. Insert the tool gently between the strap and lug to compress the internal spring mechanism, releasing the strap from the metal pins. Proceed carefully to avoid scratching the case. The Casati Milano Atelier offers installation service by appointment.

Yes, any quality 20mm strap is compatible with the lugs of the Dietrich OT OTCAO13. However, we recommend selecting materials and finishes that respect the rigorous aesthetic of the design: alligator, calf, rubber, or high-end NATO. Budget straps risk diluting the visual authority of a 46mm timepiece.

A quality leather strap (alligator or shell cordovan) lasts 3-5 years with daily wear, provided the passant remains in good condition and the leather is protected from excessive moisture and perspiration. Vegetable-tanned calf develops a natural patina over time, continuing to function after 7-10 years. Longevity also depends on climate conditions and intensity of use.