Strap for Khaki Aviation Air Race 42 Auto Black / Bracelet

The Khaki Aviation H76535131 comes fitted with a 20mm lug width (also termed strap width). This measurement is the distance between the two spring bar pins that secure the strap to the case lugs. To verify, position a digital calliper perpendicular to the pins with the strap already installed on the case.

The choice depends on intended use. For historical accuracy and flight operations: a grey-beige canvas NATO strap with water-repellent treatment. For daily elegance: vegetable-tanned calf with a satin-brushed steel deployant clasp. For extreme durability: vulcanised FKM rubber. In aviation, the NATO remains the technical solution: fastening directly over flight suit cuffs eliminates excess weight.

Use a spring bar tool: position the tip into the groove of the spring bar pin, gently press downward to compress the internal spring, and extract the pin from the case lug hole. Repeat on the opposite side. To install a new strap, insert it through the first lug, compress the pin with the spring bar tool, and insert into the second lug until you hear a click.

Yes, provided the strap is specifically manufactured for 20mm lugs. Always verify the seller's specifications. 20mm straps have identical width regardless of manufacturer, but thickness may vary: an excessively thick strap may prevent correct deployant closure against the case.

A well-maintained vegetable-tanned calf strap lasts 3-5 years in daily use. Lifespan depends on: frequency of wear, sun exposure (UV degrades fibres), ambient humidity, and perspiration. To extend life, rotate with other straps, clean monthly with a damp cloth, and apply natural wax conditioner twice yearly. The natural patina that develops indicates positive aesthetic ageing, not deterioration.