Strap for Big Crown Diamonds 38 Stainless Steel / MOP

The lug width is 19 millimetres. This measurement defines the distance between the case lugs and is critical for strap compatibility. Use a digital calliper positioned perpendicular to the case plane for an accurate reading.

Selection depends on intended use. An alligator strap with vegetable tanning elevates the watch to formal occasions whilst maintaining its avionic heritage. A soft calf strap with a stainless steel deployante clasp balances comfort and refinement. A vulcanised rubber or NATO strap references the watch's original operational context as a pilot's instrument.

Remove the watch from your wrist. Use a spring bar tool or pin extractor to disengage the elasticated pins on either side of the case. Push the pin inward gently until it retracts, then slide out the old strap. Insert the new strap, aligning the holes with the lugs, then reinject the pin ensuring it clicks into position. Verify security by pulling gently.

Yes, provided the strap is compatible with 19mm lug width. Many artisanal leather and rubber straps offer superior quality to OEM replacements, allowing colour and material personalisation. Always verify the width is exactly 19mm to prevent oscillation or forcing of the lugs.

An artisanal alligator strap with vegetable tanning resists 3–5 years in daily wear, developing noble patina. Soft calf lasts 2–4 years. Longevity depends on ambient humidity, frequency of wear, and maintenance (drying after water contact, occasional application of natural balm). Vulcanised rubber straps resist 5–7 years before surface hardening occurs.