Strap for Classima Executives Open Balance

The lug width of the Baume & Mercier Classima 8689 is 18mm. This measurement represents the distance between the inner shoulders of the lugs and is essential for selecting compatible straps. An 18mm lug width on a 42mm case creates the balanced proportion characteristic of this model.

The best strap depends on usage and personal preference. Dark brown alligator represents the conservative and refined choice that enhances the severity of the dial. Vegetable-tanned calf leather offers a caramelised patina that develops over time, whilst shell cordovan guarantees robustness and natural lustre. Vulcanised rubber leather is recommended for those seeking daily practicality whilst maintaining classic aesthetics.

Strap replacement on the Classima 8689 is accomplished using a spring bar removal tool. Position the flat end of the tool under the spring of the lug, apply gentle upward pressure to compress the spring, then extract the pin. The procedure is identical on the opposite side. Insert the new strap by aligning the holes with the lugs and snap the pin into position.

Yes, it is entirely possible and advisable. Any strap with an 18mm lug width is compatible with the Classima 8689. Artisanal straps of superior quality, crafted from alligator, vegetable-tanned calf, shell cordovan or vulcanised rubber, represent an excellent opportunity to personalise your watch whilst maintaining full mechanical and aesthetic compatibility.

The lifespan of a leather strap depends on material, frequency of use and care. High-quality vegetable-tanned calf can last 3-5 years with daily wear, developing an appreciated patina. Alligator tends to be more durable (4-7 years), whilst shell cordovan can exceed 10 years whilst maintaining structural integrity. Humidity, perspiration and sun exposure accelerate wear. An artisanal strap with an 18-month warranty offers protection against manufacturing defects.