Strap for Master Control Chronograph Calendar Pink Gold / Black / Alligator

The lug width of the Q413257J is precisely 20 millimetres. This measurement has been calculated according to horological proportional principles to balance the 40mm case diameter perfectly. To verify compatibility, measure the internal spacing between the two case lugs: it must be exactly 20mm. An undersized strap would generate unwanted lateral movement, whilst an oversized one will not fit the lugs.

High-quality alligator remains the most authentic choice: the regular grain pattern of the scales engages elegantly with the polish of rose gold, creating a restrained and refined aesthetic dialogue. Vegetable-tanned leather is a valid alternative, particularly if you prefer a patina that ages with character. For everyday versatility, a neutral-toned NATO fabric strap (grey, dark blue) maintains correct proportions whilst offering practical changeability.

Strap replacement on a Master Control requires access to the articulation pins—known as spring bars—that connect the strap to the case. Using a spring bar remover tool or consulting a professional watchmaker, one carefully compresses the pins to withdraw them from the case lugs. The process is reversed identically when fitting the replacement strap. Casati Milano executes this operation complimentary on any strap created by their atelier, as do most professional horologists.

Yes, provided it respects the 20mm lug width specification. Aftermarket straps of artisanal quality—vegetable leather, alligatore, calf—are entirely compatible and often represent the preferred choice among collectors wishing to personalise their timepiece. At milanostraps.it you will find a curated selection of 20mm straps specifically tested for proportional and constructive rigour, with geometric compatibility guaranteed.

A natural leather strap of artisanal quality, worn daily with rotation (utilising at least two straps to distribute wear), has an estimated lifespan of three to five years. Variables including climate, humidity, solar exposure, and perspiration pH significantly influence longevity. Vegetable-tanned leather generally ages more aesthetically and develops a noble patina. Occasional maintenance with natural creams extends working life considerably. Casati Milano provides an 18-month warranty against manufacturing defects and recommends periodic rotation.