Montblanc
1858 112637— lug 20mm
Montblanc 1858 112637: 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 112637The essential strap measurement.
Browse 20mm straps →112637
Montblanc caliber MB M16.29 Hours, Minutes, Small Seconds | Chronograph, Column wheel, Monopoussoir
The Heritage
Compatible Straps
Selected for the 20mm lug width of the 1858
FAQ
What is the lug width of the Montblanc 1858 Ref. 112637?
The Montblanc 1858 Ref. 112637 features a lug width of 20mm. This specification is essential for selecting compatible straps: a strap designed for an 18mm or 22mm lug width will not fit correctly to the watch's lugs. Measurement is performed using a digital calliper, positioned perpendicularly between the two lateral holes where the spring bars pass through.
Which strap material is most recommended for the Montblanc 112637 in red gold?
Alligator leather is the most refined choice for this timepiece, as its natural texture creates an elegant contrast with the warm tone of 18-carat red gold. Alternatively, shell cordovan develops a sophisticated mirror patina over time, whilst vegetable-tanned calf leather offers sustainability and a naturally vintage patina. For sporty contexts, ballistic nylon NATO straps are effective without compromising the alpine character of the 1858 collection.
How do I change the strap on the Montblanc 1858 Ref. 112637?
Strap replacement requires the use of a spring bar tool. Position the watch on a soft, stable surface, then insert the tool's blade into the slots at the ends of the lugs. Press gently to compress the spring bar, then carefully remove the old strap. Insert the new strap by aligning the holes with the spring bars, then press until the bar clicks into position. Verify that both sides are fully seated before wearing the watch.
Is the Montblanc 112637 strap compatible with quality aftermarket straps?
Yes, provided the aftermarket strap is specifically designed for a 20mm lug width. Reputable manufacturers certify this dimension in their catalogues. We recommend selecting straps crafted from noble materials—alligator, cordovan, or vegetable-tanned calf—to ensure aesthetic and functional coherence with the watch's build quality. Milano Straps offers a collection of bespoke straps compatible with this specific lug width.
What is the average lifespan of a leather strap for the Montblanc 1858 Ref. 112637?
A high-quality leather strap—alligator or cordovan—typically lasts 5–10 years under daily use with regular maintenance. Longevity depends on: frequency of wear, environmental conditions (humidity, temperature extremes), cleaning frequency, and maintenance practice. Storing the watch in controlled humidity and periodically cleaning the strap with a slightly damp cloth significantly extends its useful life. Should the buckle wear prematurely, it can be replaced independently without compromising the rest of the strap.