Strap for Praeludium Chronograph

The lug width is 22mm. This measurement is taken from the inner shoulders of one lug to the other, on the inner side of the case where the strap is attached. It is the ideal compromise for medium to large wrists, allowing versatile pairing without aesthetic heaviness.

For a German chronograph of this calibre, we recommend a strap in vegetable-tanned Tuscan leather (Testa di Moro or Bordeaux) or alligator. Both impart dignity and develop a natural patina over time. For sporty use, a heavyweight cotton NATO remains a noble and practical choice.

The strap is changed manually using a spring bar tool or small flat screwdriver. Position yourself on the lower interior lug, gently push the spring bar toward the centre of the case to release the old strap. Insert the new one in the same manner, ensuring the spring bar is fully inserted and locked.

Yes, provided it is 22mm lug width. Many aftermarket straps are compatible with the Praeludium. We recommend choosing from specialist suppliers in quality leathers (vegetable tanning, alligator, shell cordovan) to maintain the aesthetic standard and longevity of pairing with the stainless steel case.

A quality leather strap (Tuscan, alligator) typically lasts 3–5 years with daily wear, thanks also to vegetable tanning which encourages natural ageing and fibre stability. Degradation is gradual and aesthetic: patina increases appeal. A working calf strap can last 7–10 years. Cleaning frequency and climate influence durability.