Strap for SP One Platinum

The MB&F Special Projects SP1.PL.B features 18 mm lugs. This measurement is specific to the model and requires straps calibrated to precisely this width. Correct measurement is obtained by using a digital calliper inside the spring bar seat or by measuring the distance between the two external lug pins. Even a 1 mm deviation compromises the aesthetic balance and structural stability of the strap.

For the platinum SP1.PL.B, the ideal strap is alligator leather in chocolate or cognac tones, creating an elegant dialogue with the metal's austere coldness. Alternatively, vegetable-tanned calf leather offers softness and develops natural patina over time. For technical solutions, a cotton ballistic NATO in anthracite grey or vulcanised rubber in black ensures durability and versatility.

To change an MB&F strap, you will need specialised tools: a spring bar remover and a stable work surface. Position the watch with the lugs facing upward, then insert the remover into the small lateral slot of the spring bar to release it. Once the spring bar is extracted, the old strap slides away. Insert the new 18 mm strap by aligning it with both pins, then reinsert the spring bar until it clicks. If uncertain, entrust the task to a professional service such as Atelier Casati Milano.

Yes, aftermarket 18 mm straps are fully compatible with the SP1.PL.B. It is essential to verify that the strap is crafted with thicknesses consistent with platinum (recommended thickness 1.4–1.6 mm) and that the deployant buckle (if present) is proportionate to the 38 mm case. Specialised retailers such as Milano Straps provide artisanal straps calibrated specifically for this lug width.

A high-quality leather strap (alligator or vegetable-tanned calf) mounted on a daily-wear watch typically lasts 4–6 years before requiring replacement. Durability depends on exposure to moisture, perspiration and direct sunlight. Vegetable tanning develops a patina that imparts character to the strap, but gradually weakens its fibres. Regular maintenance (gentle cleaning with soft cloths and occasional conditioning) extends lifespan to 7–8 years.