Strap for Khaki Pilot Day-Date Auto 46 PVD / Black

The lug width of the H64705531 is 22 millimetres. This aviation standard is determined by ISO 20321, which regulates strap attachments on chronographs designed for professional and military aviation.

Your choice depends on intended use. For authentic aviation heritage, a nylon NATO is historically correct. For everyday elegance, vegetable-tanned calf or alligator offer comfort and natural patina development. For water sports and marine use, an FKM rubber strap guarantees water resistance and durability.

Remove the watch from your wrist. Locate the lower ends of the case (beneath the lugs). Use a spring bar tool to press the small horizontal pin securing the lug to the strap. Push upwards, remove the old strap and insert the new one, ensuring the lugs sit symmetrically in the new strap's slots.

Yes, provided the lug width is exactly 22 millimetres. Quality artisan straps are engineered to fit any wristwatch movement with this lug width. Always verify dimensions before purchase.

A quality vegetable-tanned leather strap typically lasts 3-5 years of daily wear, depending on sun exposure, humidity and cleaning frequency. Well-maintained leather, regularly treated with natural wax, can last over 7 years. NATO straps, by contrast, have virtually indefinite lifespan.