Jaeger-LeCoultre
Reverso 3842520

The attachment system of the Reverso 3842520 is an integral part of the case architecture: the lateral rails of the reversible case do not accept standard spring bars. A strap is entirely possible, but it must be built to measure directly on the watch by <a href="/pages/casati-booking">Casati Milano</a>, following a precise measurement survey carried out in the atelier.

The watch is brought to the atelier, where the craftsmen take direct measurements of the case, the lateral lugs and the attachment zone. From these real dimensions — not from standard templates — a strap is constructed that integrates seamlessly into the Reverso's geometry, with no lateral play or undue stress on the stitching. Leather, thickness, buckle, lug profile and stitching are all chosen in consultation.

The Art Déco design of the Reverso calls for leathers with inherent structure and geometry: full-grain smooth calf complements the polished flanks of the case, while hornback alligator echoes the modular logic of the original design. Colours that sit best against the steel case range from dark cordovan to midnight blue, moss green and chocolate brown — tones that integrate without competing.

A strap crafted from quality leather, with linen or silk thread stitching and hand-finished edges, can accompany the watch for many years, developing a patina that enriches its character rather than diminishing it. Longevity also depends on daily care: avoiding prolonged exposure to moisture and rotating between several straps significantly extends the life of each one.

The reference 3842520 houses the in-house calibre 854A/2, featuring an additional adjustable 12-hour hand and a Day/Night indication — a configuration that turns an already sophisticated watch into an instrument for reading time across two time zones at a glance. In a 28mm steel case, this level of information is managed with a compositional restraint that is the true hallmark of the Reverso: nothing superfluous, everything legible.