Montblanc
Heritage 112539— lug 20mm
Montblanc Heritage 112539: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Montblanc 112539The essential strap measurement.
Browse 20mm straps →112539
Montblanc caliber MB 29.16 Hours, Minutes, Seconds | Date, Day, Month | Moonphase
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Heritage
FAQ
What is the lug width of the Montblanc Heritage 112539?
The Montblanc Heritage 112539 features a lug width of 20mm. This parameter indicates the distance between the two metal pins situated on the sides of the case: 20.0mm is the external-to-external measurement. It is essential to verify this dimension before ordering an aftermarket strap, as even minor non-conformity would result in mechanical incompatibility.
Which type of strap pairs best with the Montblanc Heritage 112539?
The ideal strap depends on the intended usage context. For formal environments, an alligator in mahogany-brown or vegetable-tanned calf emphasises the sober character of the white lacquered dial. For versatile daily wear, a NATO in cotton twill or FKM rubber ensure practicality whilst maintaining aesthetic dignity. The 20mm width permits exploration of rich textures without appearing chaotic.
How do you change the strap on a Montblanc Heritage 112539?
Strap replacement on the 112539 requires a spring bar tool: a small lever that compresses the metal pin, allowing extraction from the lugs. Position the watch on a soft surface (microfibre cloth), locate the gap between lug and strap, insert the tool tip, push downward to create space, and slide the pin out of its seat. Repeat on both sides. Never force: if the pin does not yield, the new strap may have insufficient width.
Is an aftermarket 20mm strap compatible with the 112539?
Yes, provided the width has been measured correctly. A strap conforming to 20mm will insert without difficulty into the case lugs. Mechanical compatibility is guaranteed by ISO standardisation; however, verify that strap thickness does not exceed 3.5mm near the pins, otherwise it may prove difficult to don or create stress on the lugs. Quality artisanal straps naturally respect these construction parameters.
How long does a leather strap last on a Montblanc Heritage 112539?
The lifespan of a leather strap depends on frequency of use, climate, and care. A calf or alligator used daily under normal conditions retains structural integrity for 4–6 years before requiring replacement; however, the patina and colouration will continue to evolve—this transformation is part of the natural ageing of genuine leather. A seldom-worn strap (worn 2–3 times weekly) may last 8–10 years. Exposure to constant humidity and intense UV radiation accelerates biological leather degradation, whilst periodic cleaning with a damp cloth and storage in a dry environment considerably extend useful life.