Jaeger-LeCoultre
Reverso 3213402 (aka: Q3213402)

A standard catalogue strap with spring bars is not compatible with this model: the lugs are an integral part of the case's sliding mechanism and belong to the Reverso's original design. A strap is absolutely possible — it is precisely what <a href="/pages/casati-booking">Casati Milano</a> builds to measure, taking all dimensions directly from the physical watch. The result is a strap that is born on the watch, not merely adapted to it.

The process begins by bringing the watch to the atelier, where every real measurement of the attachment structure is taken — widths, profiles, thicknesses — directly from the piece itself, never from technical data sheets or photographs. Based on that survey, the strap is crafted by hand: selected leather, hand stitching, and wax-finished edges, until the finished piece integrates with the case geometry as if it had always belonged there.

The white gold case and Art Déco lines of the Reverso pair naturally with smooth-finish Alligator mississippiensis, whose near-specular surface echoes the luminosity of the case. Aged box-calf offers a more sartorial, understated contrast, while ostrich is the ideal choice for those who wear the watch under a shirt cuff. The final decision depends on use, wardrobe, and the type of buckle — pin buckle or folding deployant — agreed upon in the atelier.

A strap built with quality leather, hand stitching, and wax-finished edges can last many years with proper care: avoid prolonged exposure to water and perspiration, and periodically condition the leather with suitable products. Intensity of use also plays a role — a strap worn daily will develop a natural patina over time, which on leathers such as box-calf is very much part of the character of the piece. Bespoke construction ensures the strap does not fail prematurely due to fitment issues.

The sliding and reversible case mechanism was patented by Jaeger-LeCoultre in 1931 to meet a practical need: protecting the dial during polo matches. The solution — a carriage on which the case slides and flips — was an engineering achievement before it was an aesthetic one, yet it proved formally perfect for the Art Déco sensibility of the era. Today the Reverso 3213402, housing the calibre 846/1 in a white gold case, preserves that constructive logic intact: a mechanism that has never become obsolete because it has never tried to be anything other than what it is.