Strap for Classima Executives Big Date Power Reserve

The lug width of the Baume & Mercier Classima 8877 is 18mm. This measurement represents the distance between the two case attachment pins and is essential for selecting compatible straps. A common error is confusing the case width with the lug width: the latter is always smaller to allow strap passage without lateral friction. Verifying the measurement with a digital calliper prevents incompatible purchases.

The best strap choice depends on usage and aesthetic preferences. For formal contexts, alligator represents the most elegant solution thanks to its natural texture and pronounced grain. For daily versatility, vegetable-tanned calf offers authentic patina and aesthetic development over time. Rubber provides the most practical and durable choice. Ideal colour pairings with the brushed stainless steel case include tones such as Tuscan brown, cognac, black and stone grey.

Changing the strap requires a specific tool called a spring bar tool or strap removal lever. Position the watch on a soft surface, insert the lever into the small space between the pin and the case, then gently lift to disengage the spring. Once the old strap is removed, position the new strap pins into the case slots and lower until they click into place. For those without the necessary tools, it is advisable to entrust the task to a professional watchmaker.

Yes, any strap with an 18mm lug width is compatible with the 8877. Aftermarket straps allow aesthetic and functional customisation compared to the original strap, whilst maintaining the same mechanical compatibility. It is important to verify that the strap is indeed 18mm in size and that the attachment system (straight or tubular pins) matches that of the case. High-quality artisanal straps also offer superior visual craftsmanship to the original.

The lifespan of a natural leather strap varies depending on the material, tanning method and daily use. A quality calf strap, subjected to regular use, maintains functionality and aesthetic appearance for 3–5 years. Alligator, due to its denser molecular structure, can last 5–7 years. Vegetable tanning, because of its less uniformly treated nature, develops a patina that some appreciate, but can show more visible wear after 4–6 years. Rubber guarantees maximum longevity, exceeding 10 years. Regular maintenance (cleaning, drying after moisture) significantly extends useful life.