Strap for Orion 33 / Closed Case Back

The lug width of the Orion 321 is 17.00 mm. This dimension is proportioned to the 32.80 mm case diameter and represents a deliberate design choice by the manufacture. To verify correctly, measure with a ruler directly on the internal lug seat, from wall to wall.

Given the Orion 321's minimalist Bauhaus philosophy, it pairs best with natural and understated strap materials. A medium brown alligator strap, or calf leather with vegetable tanning in taupe-grey tones, represent the most coherent choices with the watch's aesthetic identity. For formal contexts, authentic shell cordovan guarantees superior elegance.

The Orion 321 uses straight lugs measuring 17 mm. To replace the strap: remove the watch from your wrist, use a specialised spring bar tool to push the retaining pin inward, extract the pin, remove the worn strap, insert the new strap, and reinsert the pin. If you lack experience, contact Casati Milano for professional assistance.

Yes, you can use aftermarket straps with a certified 17 mm lug width. Ensure the strap has been measured with millimetre precision, as dimensional tolerance errors will result in unwanted lateral movement of the lug. On milanostraps.it you will find a comprehensive selection of compatible 17 mm straps, from natural leather to NATO, all dimensionally verified.

A leather strap's lifespan depends on the material and usage patterns. An alligator or authentic shell cordovan strap with vegetable tanning, with ordinary care (avoiding water, prolonged humidity, direct sunlight), maintains structural integrity for 4-7 years. Vegetable-tanned calf typically lasts 3-5 years. The natural patina that develops is desirable. Casati Milano offers restoration and lug-replacement services.