Strap for Speedmaster 60th Anniversary

The lug width of the Speedmaster Professional 311.10.39.30.01.001 is 19 millimetres. This measurement is determined by the geometry of the 38.60 mm case and represents the specific standard for this model. Always verify the distance between the strap attachment points with a calliper before purchase to avoid compatibility errors.

Aniline alligator with fine grain is the preferred formal choice, providing aesthetic balance with the complex dial. For daily use and noble ageing we recommend vegetable-tanned leather in brown or black. Shell cordovan offers tactile density and restrained lustre. Heavy twill NATO fabric straps echo the chronograph's aeronautical origins and provide practical wearability.

Use a spring bar tool to remove the elastic pins securing the strap to the lugs. Position the forked lever under the pin and apply light, steady upward pressure to release the mechanism. Repeat on both sides. Install the new strap by reversing the procedure, ensuring the pins click audibly into position.

No, this is not recommended. The correct lug width is 19 mm. A 20 mm strap will create excessive play and risks damaging the lugs. An 18 mm strap will be too tight. Always choose straps certified at 19 mm to guarantee mechanical fit and proportionate aesthetics. Investing in a custom-measured artisanal strap protects your watch.

A quality artisanal leather strap, with vegetable tanning or aniline alligator, typically lasts 3–5 years with daily wear and routine maintenance. Longevity depends on frequency of wear, sun exposure, humidity, and periodic care. Applying natural balms and rotating with alternative straps significantly extend durability. Casati Milano guaranteed straps lasting 18 months are engineered to exceed this standard with premium, carefully selected leathers.