Strap for Heritage Chronometrie Quantieme Complet

The Montblanc Heritage 112538 features a lug width of exactly 20 millimetres. This measurement is the established standard for 40-millimetre diameter watches and is verified by measuring the distance between the two lateral lugs (spring bar attachment points) on the case. The precision of this measurement ensures complete compatibility with bespoke leather straps designed for this width.

For the 112538, we recommend a strap in alligator or calf leather with vegetable tanning: the regular grain of the leather dialogues elegantly with the satin-brushed texture of the steel case, and the material develops patina over time. Alternatively, a NATO fabric strap offers versatility for more dynamic daily use, whilst structured natural rubber is ideal for transitions to informal contexts whilst maintaining the visual integrity of the watch.

The procedure is straightforward: use a small tool (sprung bar tool or a pointed implement) to release the spring mechanism of the lateral lugs. Push the spring gently inward and slide the lug pin out of the case lug. Remove the original strap, position the new strap by aligning the holes with the lug pins, and reinsert the pins until the springs re-engage. Verify alignment before wearing the watch.

Absolutely. The 20-millimetre lug width is an international standard, and any bespoke strap constructed for this width is fully compatible. Milano Straps offers custom straps in leather, NATO and rubber specifically manufactured for this measurement. The Milanese artisanal quality also allows customisation of colour, buckle type (standard passant or deployante) and stitching style according to preference.

A high-quality leather strap with vegetable tanning, worn daily, has an average lifespan of 3-5 years before replacement is required. Longevity depends on intensity of use, tanning method and elementary maintenance: keep the leather dry when possible, avoid prolonged water immersion and occasionally clean with a soft cloth. The patina that develops over time does not compromise functionality but enriches the aesthetic appearance. On models like the 112538, the ability to frequently replace the strap is one of the most appreciated features amongst users.