Strap for BC4 Flight Timer Stainless Steel / Black / Bracelet

The lug width is 22mm, which refers to the space between the spring bar attachment points that connect the strap to the case. This measurement is essential to ensure the strap is perfectly compatible with the dial and does not present lateral gaps. To verify the measurement, use a digital calliper, measuring the internal distance between the holes where the spring bar is inserted.

For the BC4, we recommend alligator or calf leather in vegetable tanning in dark brown, cognac or medium brown tones. These choices respect the aviation aesthetic of the watch and offer durability over time. Alternatively, if you seek practicality, a robust cotton NATO or FKM rubber ensures moisture and solvent resistance for aeronautical environments.

To change the strap: remove the watch from your wrist and locate the spring bars that connect the strap to the case lugs. Use a spring bar tool to gently push the bar inward, sliding the old strap away from the lugs. Insert the new strap, aligning the holes with the attachments, and ensure the spring bar clicks securely into position. Verify that the strap is stable and does not move laterally.

Yes, absolutely. Milano Straps offers artisanal 22mm straps specifically compatible with the BC4. Always verify that the lug width is exactly 22mm and that the buckle or deployante clasp is adjustable to fit your wrist. High-quality straps, such as those in vegetable-tanned leather, ensure longevity and develop patina over time.

A quality leather strap, vegetable-tanned and regularly maintained, lasts approximately 4-7 years with moderate daily use. Longevity depends on ambient humidity, direct sun exposure and cleaning frequency. Vegetable tanning is particularly sensitive to moisture: dry the strap after rainy days. Milano Straps offers maintenance and replacement services to extend the life of your strap.