Strap for Heritage Spirit Date Automatic 39mm Two Tone Bracelet

The Montblanc Heritage 111625 features a lug width of 18 millimetres. This measurement, calculated as the internal distance between the two lateral attachment points on the case, is specifically calibrated for the proportions of this 39mm case in red gold and stainless steel. An 18mm lug width is a rarity in contemporary watchmaking and requires dedicated straps to ensure perfect fitment.

For the 111625, an alligator strap in dark brown or cognac represents the pinnacle of refinement, enhancing the warmth of the red gold. Alternatively, vegetable-tanned calf offers an organic character and develops a patina that evolves over time. For seasonal versatility, canvas NATO straps with leather reinforcement and vulcanised black rubber combine comfort with refined sobriety.

The strap is changed by removing the spring bars—small metal rods that connect the strap to the case. Using a dedicated tool (spring bar tool) or consulting a professional, gently extract the spring mechanism, remove the old strap, and insert the new one. To prevent damage to the case, it is advisable to entrust this operation to a skilled watchmaker or an atelier such as Casati Milano.

Yes, any 18mm strap manufactured to standard specifications is compatible with the 111625, provided the spring bars are of the correct dimensions. Artisanal straps, such as those available on milanostraps.it, are crafted following precise lug width specifications, ensuring a snug fit and complete structural security.

A quality natural leather strap with vegetable tanning or alligator construction has an average lifespan of 3 to 5 years of daily use. Longevity depends on care: avoid prolonged exposure to moisture, protect from direct heat sources, and clean with a soft, slightly dampened cloth to extend its life. The patina and traces of wear are a natural part of the strap's ageing, granting it an increasingly personal and distinctive character.