Strap for Speedmaster Reduced Ladies Stainless Steel / Diamond / MOP / Red / Bracelet

The lug width of the Speedmaster Reduced 3535.79.00 is 18mm. This is an unconventional measurement in the watchmaking industry, requiring specialized suppliers and artisanal expertise to ensure proportionate pairing with the 39mm case.

The ideal strap depends on intended use and desired aesthetics. Black alligator leather with vegetable tanning offers formal elegance while maintaining sportiness; Italian calf with tight grain texture ensures daily durability and rich patina over time; black FKM rubber provides practicality for humid environments. The 18mm lug width guarantees proportions historically faithful to the model.

To measure lug width, position a caliper or ruler between the pins supporting the spring bar. On this 39mm reference, the 18mm lug width is perfect. Strap changing occurs by extracting the pins through the side lugs of the case. With the correct tools and a stable work surface, the operation takes 5–10 minutes; for flawless results, entrust the task to Casati Milano.

Yes, any strap with an 18mm lug width will fit the 3535.79.00 case. Technical compatibility is guaranteed; aesthetic compatibility depends on strap thickness (ideally 3.5–4.5mm), finish, and color. The artisanal straps from milanostraps.it are dimensioned and tested for this specific model.

A quality leather strap, with vegetable tanning and structured thickness, maintains aesthetic and functional integrity for 3–5 years under moderate use conditions. Alligator can exceed 7 years. Sweat, humidity, and sun exposure accelerate aging. Casati Milano offers an 18-month warranty on the strap and maintenance touch-ups at the end of its useful life.