Strap for Classima Executives Open Balance

The Baume & Mercier Classima 8688 features a lug width of 18 millimetres. This measurement, also known as ansa width, represents the distance between the inner walls of the case lugs and determines strap compatibility. To verify this dimension, measure the internal space between the lugs using a digital calliper: the result must correspond precisely to 18mm to ensure proper fit without forcing.

The optimal material depends on intended use and personal aesthetic preferences. For formal elegance, alligator leather with vegetable tanning offers a natural grain texture and a patina that develops over time. For daily versatility, smooth calf leather in neutral shades (black, dark brown) guarantees comfort and practicality. For those seeking rarity, shell cordovan develops a distinctive burgundy patina. For sporting or casual contexts, a structured rubber strap or NATO textile in satin nylon is ideal. The choice between a deployante clasp and a traditional buckle also influences adjustment ease and security.

Changing the strap on the Classima 8688 requires a dedicated tool: a spring bar tool, featuring two curved tips that enable slight compression of the spring bars (small springs securing the strap to the lugs). Position the tool beneath the spring bar end, press inward to release tension, then remove the strap. Repeat on the opposite lug. When installing the new strap, align the holes with the spring bar ends, press downward until you hear the engagement click. If inexperienced, consult a watchmaker to prevent case damage.

Yes, the Classima 8688 is fully compatible with quality aftermarket straps manufactured to 18mm lug width specifications. At Milano Straps you will find a comprehensive selection of artisanal straps in alligator, calf leather, shell cordovan and other materials, all suitable for this dimension. We recommend verifying the strap's total length (height) to ensure wrist comfort; typically, for a timepiece of this size, a length of 120–130mm for the wide end and 70–80mm for the narrow end is appropriate. The Casati Milano atelier can further customise dimensions according to your preferences.

A quality leather strap, featuring vegetable tanning or authentic alligator, has an average lifespan of 5–7 years under moderate daily use, assuming regular maintenance. Factors including direct sunlight exposure, perspiration, humidity and frequency of wear influence longevity. Shell cordovan, owing to its fibrous structure, tends to last considerably longer, up to 8–10 years. Straps supplied by Milano Straps benefit from an 18-month warranty and are crafted from premium leathers selected by the Casati Milano atelier, ensuring solid construction. Periodic maintenance with specialist products (natural hydrating creams, avoiding silicones) significantly extends durability.