Strap for Classic Date 37 Stainless Steel / Black / Bracelet

The lug width of this model is 18 millimetres. This dimension is determined by the distance between the inner lugs and ensures correct strap seating without lateral play. To verify compatibility of an aftermarket strap, always measure with a digital calliper between the internal anchor pins.

To maintain the classical elegance of this model, we recommend vegetable-tanned leather (cognac, dark brown, or burgundy) or alligator for formal contexts. Natural black rubber is a valid alternative for daily wear and maritime environments. Avoid inelegant NATO straps: the strap should reflect the constructive sobriety of the watch.

Gently remove the anchor pins (spring bars) using a spring bar tool. Position the tool beneath the pin, apply downward pressure to compress it, then extract the strap. Insert the new strap ensuring the pins click securely into position. Never force: the mechanism must operate smoothly and effortlessly.

No. A 20mm strap will not fit properly into the 18mm lugs of model 01 733 7578 4054-07 8 18 61. It would cause lateral play, premature strap wear, and risk of abrasion on the lug finishes. Millimetric precision is essential: use exclusively 18mm straps.

A vegetable-tanned leather strap of quality lasts approximately 4–6 years with ordinary maintenance (monthly cleaning, protection from excessive moisture, rotation with at least one additional strap). Alligator may last 7–10 years thanks to denser fibre. Durability depends on environment (humidity, perspiration, sun exposure) and preventive care.