Strap for Fifty Fathoms Automatique Stainless Steel / Blue / Blue Canvas

The lug width of the Blancpain Fifty Fathoms 5015D-1140-52B is 23 millimetres. This measurement is specific to Fifty Fathoms of this generation and is determined by the distance between the case attachment pins. It is a non-standard size requiring dedicated straps incompatible with most off-the-shelf solutions.

For a Fifty Fathoms in steel of this calibre, alligator remains the supreme choice owing to its resistance to salt water corrosion and the natural patina it develops over time. Full-grain vegetable-tanned calf offers an elegant and versatile alternative, whilst shell cordovan provides a deep and fascinating patina. For intensive underwater use, a vulcanised rubber strap is the most practical solution.

To change the strap, use a spring bar tool or dedicated pin removal instrument to extract the pins anchoring the strap to the case. Position the tool against the pin and apply gentle outward pressure until the pin is fully removed. Repeat on the opposite side. Ensure the new strap has a 23mm lug width before proceeding.

All straps with a 23-millimetre lug width are compatible with the Blancpain Fifty Fathoms 5015D-1140-52B. Milano Straps offers a specialised selection of artisanal 23mm straps, crafted from alligator, calf, shell cordovan and vulcanised rubber, perfectly suited to the proportions and character of this model.

A high-quality leather strap constructed with vegetable tanning has a lifespan of 3-5 years with daily wear, extendable to 7-10 years with proper maintenance and rotation of use. Alligator and shell cordovan are particularly durable owing to the natural fibre structure. Longevity depends on humidity exposure, underwater use and the frequency of spring bar replacement.