Strap for Big Crown Royal Flying Doctor Service II Stainless Steel / Black

The lug width is precisely 22mm. This dimension is calculated based on the proportions of the 45mm case and the position of the lugs. It is not possible to fit straps of 20 or 24mm without compromising comfort and mechanical integrity. Correct measurement is performed with a digital calliper, measuring from the centre of one lug to the centre of the other in a perpendicular position to the bar.

It depends on the use case. Vegetable-tanned alligator offers formal elegance and emphasises the case design. Vegetable-tanned calf leather is the ideal compromise between versatility and durability, with a natural patina that improves over time. NATO straps enhance the watch's aviation heritage. Rubber is ideal for aquatic or humid environments. We recommend trying multiple materials over time to discover which one dialogues best with your wrist and personal style.

Strap replacement is performed by removing the spring bar (or lug bar) that connects the strap to the case lugs. A dedicated tool, a lug bar removal tool, is inserted into the space between the case and the strap to push the elastic pin and release the bar. Once the strap is removed, the new one is positioned over the lugs and the spring bar is reinserted until a click is felt. The operation requires care to avoid scratching the case, especially if it has a brushed steel finish.

Absolutely. An artisanal strap crafted by specialists such as Milano Straps with the correct 22mm lug width guarantees mechanical compatibility and superior construction quality to the factory strap. The difference lies in selected materials (vegetable-tanned leather, hand-stitching, detailed finishing) and aesthetic customisation. A bespoke strap transforms the wearing experience of the Big Crown, allowing you to adapt the instrument to your visual identity.

Longevity depends on the tanning method, usage and maintenance. A quality leather strap with vegetable tanning has an average lifespan of 3-5 years with daily use. Vegetable-tanned leather develops patina and gradually hardens, but resists well if treated with occasional applications of leather-specific conditioner. A rubber strap has a longer lifespan (5-7 years) but less aesthetic character. The recommendation is to have multiple straps available to rotate and extend the life of each one.