Strap for Quai des Bergues N°33 bis

The Czapek Quai des Bergues QDB33bis features a lug width of 20 mm. This dimension is the result of precise proportional calculation between the 42.50 mm case in red gold and the overall geometry of the movement. Any strap purchased must have exactly 20 mm lugs to ensure a gapless fit on the case.

Natural alligator leather with vegetable tanning represents the optimal choice from both aesthetic and mechanical perspectives. The irregular texture of crocodile skin engages naturally with the progressive patina of red gold, whilst vegetable tanning ensures harmonious colour maturation over time. Alternatively, shell cordovan in dark tones offers a lustrous surface that reflects light elegantly from the case without competing with it.

To change the strap, you must remove the attachment pins that connect the lugs to the case. Use an appropriate tool (a pin removal instrument) and proceed with extreme care, as the pins are small in size. Work on a soft, flat surface. Align the new strap lugs with the case holes and reinsert the pins with smooth, precise movement. If you lack experience, consult a certified watchmaker.

Yes, it is absolutely possible to use a quality aftermarket strap, provided the lug width is exactly 20 mm and the material is of superior quality. Straps in alligator, shell cordovan or calf leather made by specialist manufacturers will not negatively impact the watch if removed and reinserted correctly. Avoid straps with 18 mm or 22 mm lugs, as they may cause abnormal stress on the pins.

A vegetable-tanned leather strap (alligator or shell cordovan) worn daily on the QDB33bis has a lifespan of 3–5 years before showing significant wear. Longevity depends on water exposure, frequency of wear and maintenance (periodic cleaning, rapid drying in case of rain). Soft calf leather straps tend to last slightly less (2–4 years), whilst canvas NATO straps can last 5–7 years without aesthetic degradation.