Technical Archive

Montblanc
Timewalker 105813— lug 20mm

Montblanc Timewalker 105813: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

TimeWalker Date Automatic 4810 39 Silver / Red Gold Numerals

Artisanal Note

"This model requires a precise 20mm lug width to preserve the original sartorial balance."

Technical Specifications

Montblanc 105813
Lug Width
20 mm

The essential strap measurement.

Browse 20mm straps →
Reference

105813

Movement

Montblanc caliber 4810/100 Hours, Minutes, Seconds | Date

The Heritage

The Montblanc Timewalker 105813 is a 39mm stainless steel automatic watch featuring the Montblanc 4810/100 movement with chronograph function, hours, minutes, seconds and date display. The case offers 100-meter water resistance and includes a transparent caseback revealing the decorated movement. The 20mm lug width accommodates a wide range of compatible straps for customization.

FAQ

What is the exact lug width of the Montblanc Timewalker 105813?

The lug width of the Montblanc Timewalker 105813 is precisely 20mm. This technical specification determines compatibility with aftermarket straps and must be adhered to for secure and safe wear. Measurement is taken between the inner shoulders of the case lugs.

Which strap would you recommend for the Timewalker 105813?

For everyday use, we recommend a vegetable-tanned calf leather strap, which develops a rich patina naturally over time. For formal occasions, an alligator strap delivers uncompromised elegance. For dynamic environments and water exposure, vulcanised rubber or NATO fabric straps provide practicality and durability.

How do you change the strap on the Montblanc Timewalker 105813?

Strap replacement involves removing the lateral spring bars (spilles) that pass through the case lugs. Use a dedicated spring bar tool to extract the pins without damaging the case. Align the new strap's internal holes with the pin, then reinsert until you hear or feel the security click.

Are there aftermarket straps available that are compatible with the 105813?

Yes, the 20mm lug width is a widely adopted standard in the artisanal strap market. Milano Straps offers a comprehensive collection of 20mm-compatible straps in multiple materials—alligator, vegetable-tanned calf, shell cordovan, NATO, and rubber—specifically engineered for Timewalker 105813 compatibility.

How long does a leather strap last on a watch like the Timewalker 105813?

Lifespan varies by material and usage patterns. Vegetable-tanned calf typically lasts 3-5 years with regular daily wear. Alligator, being denser, can last 5-7 years. NATO fabric typically lasts 4-6 years. Vulcanised rubber, being water-resistant, lasts approximately 3-4 years. Regular maintenance—gentle cleaning and annual conditioning—significantly extends longevity.