Baume & Mercier · Classima

Strap for Classima Executives Chronograph

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter42 mm
Reference8732 (aka: MOA8732, MOA08732, M0A8732, M0A08732)
FamilyClassima
MovementETA caliber 7750 hours, minutes, small seconds | date, day | Chronograph
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Classima 8732 (aka: MOA8732, MOA08732, M0A8732, M0A08732)

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The Classima 8732 (aka: MOA8732, MOA08732, M0A8732, M0A08732), seen from the bench

The Baume & Mercier Classima 8732 (references MOA8732, MOA08732, M0A8732, M0A08732) is a 42mm stainless steel chronograph from the Classima collection. It features the ETA 7750 movement, a Swiss mechanical base with chronograph complications including hour and minute counters, date and day indicators. The 18mm lug width accommodates this classic design with sapphire crystal and unidirectional bezel. The watch exemplifies refined Swiss watchmaking with a visible caseback and legible dial layout.

Frequently asked questions

What is the lug width of the Baume & Mercier Classima 8732?

The lug width is exactly 18 millimetres. This measurement corresponds to the distance between the integrated lugs of the stainless steel case. It is advisable to verify with a digital calliper before ordering an aftermarket strap to ensure absolute compatibility.

What is the best strap for the Baume & Mercier Classima 8732?

There is no absolute 'best', but the choice depends on intended use and dial colour. For formal elegance, we recommend alligator in brown tones or calf leather in shades complementary to the dial. For daily practicality, a grey NATO strap or FKM satin-finish rubber guarantees versatility. Vegetable-tanned leather represents the sustainable choice without aesthetic compromise.

How do you change the strap on a Baume & Mercier?

Remove the original strap using a non-aggressive lever tool (spring bar tool) on the springs protruding from the case lugs. Completely withdraw the springs, insert those of the new strap and secure them to the case seats. Verify that the strap is positioned parallel to the case without inclinations. The operation requires 2-3 minutes for experienced users.

Is an 18mm aftermarket strap compatible with the Classima 8732?

Yes, provided the strap is specifically manufactured for an 18mm lug width. The integrated lugs of the Classima 8732 do not require special-diameter spring bars. Verify that the springs have standard 1.5mm diameter. Straps manufactured by specialised ateliers such as Casati Milano guarantee certified compatibility.

How long does a leather strap last on a Baume & Mercier?

Durability depends on leather quality, usage intensity and maintenance. A high-quality alligator or shell cordovan strap with vegetable tanning lasts 5-7 years with daily wear, developing natural patina. A softer calf leather requires replacement every 3-4 years. Periodic maintenance (gentle cleaning, conditioning) significantly extends the useful life of the strap.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only