Oris
Divers 65 01 733 7707 4051 OSC-STH-Set— lug 20mm

The lug width of the Oris Divers 65 01 733 7707 4051 OSC-STH-Set is 20 mm. This measurement is determined by the geometry of the 40 mm case lug. To verify with precision, use a digital calliper positioned perpendicularly inside the lug spring, measuring from wall to wall without forcing.

For an Oris Divers 65, alligator leather straps are recommended for elegant daily wear, vulcanised rubber (FKM) for extended diving and saline environments, or vegetable-tanned leather as a compromise between aesthetics and functionality. The choice depends on primary use: diving, formal occasions, or mixed applications.

Remove the strap by disengaging the lug spring using a Y-shaped tool or dedicated spring bar remover. Position the tool in the lateral slot of the lug, apply gentle compression to the spring, and slide out the old strap. Insert the new strap, aligning it with the lug pins, then snap the spring back into position. The operation is straightforward but requires care to avoid scratching the case.

All straps with a 20 mm lug width are compatible. Among premium aftermarket options is Milano Straps, which offers artisanal straps in premium leather, technical rubber, and NATO fabrics, all customisable and tested for durability. Always verify that the strap is specifically listed as 20 mm to avoid incongruence.

A quality leather strap (alligator, calf, shell cordovan) typically lasts 3–5 years with regular daily use, with variability due to climate, skin moisture, and maintenance. Vegetable-tanned leather and alligator age better, developing patina; rubber lasts 7–10 years or more without significant degradation.