MB&F
Special Projects SP1.RL.B— lug 18mm

The lug width of the MB&F Special Projects SP1.RL.B is 18mm. This non-standard dimension requires a specific strap, measured from the inner shoulder of one spring bar to the other. At milanostraps.it, you will find a dedicated collection of 18mm straps compatible with this model.

The best strap depends on your usage and aesthetic preferences. For formal elegance, we recommend alligator in cognac tones or vegetable-tanned calf leather. For a contemporary approach, a charcoal-grey NATO textile strap enhances the radical geometry of the case. For durability and versatility, high-quality rubber is ideal. Your choice should reflect the design philosophy of the watch.

Strap replacement is accomplished using the spring bars (pressure springs) located at the ansa extremities. Use a dedicated tool (spring bar tool) to compress the spring and slide out the old strap. Position the new strap, aligning the holes with the spring bars, and release: the spring will click into place. For watches of the value of the SP1.RL.B, we recommend having the operation performed by an expert.

Yes, any strap with an 18mm lug width is compatible. However, the construction quality must be superior to honour the design level of the watch. We recommend specialised artisans such as milanostraps.it, who offer certified leather, precise stitching and refined finishes, ensuring compatibility and durability over time.

A premium leather strap, used daily, typically lasts 3-5 years before requiring maintenance or replacement. Factors such as sun exposure, humidity and intensity of use affect longevity. Vegetable tanning is more robust and resistant to ageing than alligator leather. With proper care and rotation between multiple straps, the useful life extends significantly.