Strap for Big Pilot’s Watch Annual Calendar Spitfire

The lug width of the IW5027-02 is 22mm. This measurement is specific to the Big Pilot models with a 46.2mm case and is determined by the distance between the case lugs where the strap is fixed. To verify, measure the inner width between the two lugs with a digital calliper.

For the Big Pilot, alligator leather, vegetable-tanned leather, or FKM rubber straps are ideal. Alligator offers natural texture and develops patina over time. Tuscan vegetable-tanned leather in dark brown creates proportional harmony with the steel case, whilst rubber ensures practicality and water resistance.

Strap replacement is performed by removing the spring bars that connect the Big Pilot's lugs to the strap. Using a dedicated tool (strap remover), lift the spring bar from its seat, withdraw the strap, and insert the new one by aligning the holes. The spring bars must return fully into position to ensure stability.

Yes, any strap with a 22mm lug width is compatible with the Big Pilot IW5027-02. On milanostraps.it you will find artisanal 22mm straps ready for shipment or customisable through the Casati Milano atelier, which creates bespoke pieces with leather selection and an 18-month guarantee.

A quality vegetable-tanned leather strap has a lifespan of 3-7 years, depending on wear and maintenance. Alligator leather straps tend to last longer due to the natural density of the hide. With proper care (regular cleaning, conditioning with specific creams), patina can enhance aesthetics without compromising structural integrity.