Strap for Essence Leggera Automatic Chronometer Electric Blue / Rubber

The Formex Essence 0330.4.6339.910 features a 22mm lug width. This measurement refers to the distance between the two horizontal spring bars that support the strap. It is advisable to verify this measurement with a digital calliper to ensure compatibility with aftermarket straps.

Three primary solutions are recommended for this model: alligator or calf leather with vegetable tanning for sophisticated and durable aesthetics; NATO strap in technical canvas for sporty and dynamic use; vulcanised rubber strap for marine environments or high-humidity conditions. Your choice depends on lifestyle and personal aesthetic preferences.

To change the strap, you will need: a quality spring bar remover, a flat and well-lit work surface, and cotton gloves to avoid scratching the case. Gently remove the pins from their seat by applying light lateral pressure with the remover. Insert the pins into the new strap with perfect centering, and verify that the strap fits without lateral play on the case.

Yes, it is fully recommended. The 22mm lug width is a standard found throughout contemporary horology, so the choice of compatible straps is wide. Always verify that the thickness and depth of the strap are appropriate for the Formex lug seat, and that the construction quality is equivalent to the level of your watch.

Durability depends on the type of leather and intensity of use. An artisanal-quality alligator or vegetable-tanned calf leather strap lasts on average 3–5 years under moderate daily use conditions. Natural leather ages by developing a sought-after patina. Avoid prolonged exposure to moisture, intense perspiration, and direct UV rays. Periodic treatment with specific protective cream significantly extends the useful life of the strap.