Strap for Nighthawk

The lug width of the CA0890-54H is precisely 22 millimetres. This dimension is the standard specification for Eco-Drive sports chronographs of this generation and ensures compatibility with the extensive global aftermarket strap catalogue. To verify the correct measurement, remove the original strap and measure the internal space between the lugs: exactly 22mm.

For the CA0890-54H, we recommend an alligator strap with vegetable tanning for professional contexts, or Italian calf leather (thickness 2.0-2.2mm) with steel deployante for daily wear. NATO straps are ideal if you change straps frequently, whilst FKM rubber is the optimal choice for humid or marine environments.

To change the strap, you must remove the spring bars positioned at the case ends using appropriate tools: a flat-bladed knife or a dedicated strap removal tool. Gently lift the spring bar retaining lug, extract the old strap, and insert the new one in the same space. Ensure the spring bars are secure before wearing the watch.

Yes, any strap with a 22mm lug width is compatible with the CA0890-54H, provided the thickness (typically 2.0-2.5mm for leather) is consistent with the weight of the 42mm case. NATO, rubber, alligator and calf straps are all suitable. Always verify that the spring bars are of the same width (1.8-2.0mm for the CA0890-54H).

A quality leather strap (alligator, calf, shell cordovan) worn daily has an average lifespan of 3-5 years before the leather shows structural deterioration. Longevity depends on frequency of use, moisture exposure and climatic factors. An FKM rubber strap has a longer lifespan (5-7 years), whilst well-maintained nylon NATO straps can last 7-10 years.