Montblanc · Heritage

Strap for Heritage Chronometrie Ultra Slim

Takes 19 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width19 mm
Case diameter38 mm
Reference112515
FamilyHeritage
MovementMontblanc caliber MB 23.01 hours, minutes
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the Heritage 112515

Selected for the 19 mm lug width · workshop selection

All 19 mm straps →

The Heritage 112515, seen from the bench

The Montblanc Heritage reference 112515 is equipped with the automatic MB 23.01 caliber with hour and minute indication. The watch features 19mm lugs for the strap. The Montblanc movement offers an internal construction developed by the Swiss manufacture.

Frequently asked questions

What is the lug width of the Montblanc Heritage 112515?

The Montblanc Heritage 112515 features a lug width of 19mm. This measurement, taken from the base of one lug to the base of the other, is the definitive compatibility parameter for aftermarket straps in the Milano Straps catalogue. Accurate measurement is essential before ordering a replacement strap.

Which strap is recommended for the Montblanc Heritage 112515?

Selection depends on intended use and aesthetic preference. For formality and everyday elegance, an alligator or vegetable-tanned calf strap in cognac, dark brown, or burgundy emphasises the case's classical character. NATO fabric in grey or military green orients the watch towards contemporary retro styling. Synthetic rubber remains ideal for humid climates and high-rotation wear, keeping the lugs consistently clean.

How do I change the strap on the Montblanc Heritage 112515?

Removing the original strap requires careful handling. A dedicated spring bar tool is necessary to compress the elastic lugs without scratching the case. Insert the tool between the lug and lug base, apply measured lateral pressure, and extract the pin. When fitting the new 19mm strap, align the holes with the lugs and compress gently inward until the pin clicks into position. Verify secure anchoring on both sides.

Is the Montblanc Heritage 112515 compatible with aftermarket straps?

Yes, entirely. The standard 19mm lug width is compatible with any certified artisanal strap of identical width. Milano Straps 19mm straps fit the 112515 perfectly, maintain aesthetic integrity of the case, and require no structural modifications. Montblanc movement warranty remains uncompromised by strap replacement.

What is the lifespan of a natural leather strap on a Montblanc Heritage 112515?

A vegetable-tanned leather strap, with proper maintenance, typically lasts 3-5 years in daily use. Environmental humidity, frequency of wear, sun exposure, and periodic care significantly influence durability. Monthly cleaning with a damp cloth and balm application every 6-8 months extends strap life and accelerates patina development. Use in very humid climates or high-perspiration conditions accelerates wear.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

Request an appointment →

Casati Milano · Via XX Settembre 15, Milan · by appointment only