Technical Archive

A. Lange & Söhne
Lange 1 101.026— lug 20mm

A. Lange & Söhne Lange 1 101.026: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Lange 1 Stainless Steel

Artisanal Note

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

Technical Specifications

A. Lange & Söhne 101.026
Lug Width
20 mm

The essential strap measurement.

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Reference

101.026

Movement

A. Lange & Söhne caliber L901.0 Hours, Minutes, Small Seconds | Big Date | Power Reserve Indicator

The Heritage

The Lange 1 was introduced in 1994 as the first model of the revived A. Lange & Söhne manufacture. It features the hand-wound caliber L901.0 with functions for hours, minutes, small seconds, big date, and power reserve indicator. The case displays the characteristic asymmetric dial layout with the big date positioned at 1 o'clock.

FAQ

What is the lug width of the A. Lange & Söhne Lange 1 101.026?

The A. Lange & Söhne Lange 1 reference 101.026 is fitted with a 20 mm lug width exactly. This measurement is taken with a 20mm caliper positioned inside the case lugs. It is essential to respect this width to the millimeter to ensure correct strap insertion and aligned closure.

What is the best strap for the A. Lange & Söhne Lange 1 101.026 in steel?

For the 101.026 steel reference, black or anthracite grey box calf in smooth calfskin represents the most coherent choice with the silvered dial and sober case. Matte alligator in midnight blue or tobacco is ideal for those seeking a more textured look. For active use, technical NATO in heavy nylon or vulcanized rubber offer comfort and water resistance without altering the dial's aesthetics.

How do you change the strap on the A. Lange & Söhne Lange 1 101.026?

Replacing the strap on the Lange 1 101.026 requires a fine-tipped or spoon-shaped spring bar tool, inserted into the hole or internal channel of the lug to compress the spring bar. It is recommended to work on a soft surface to protect the steel case from scratches. In case of doubt, a watchmaker or the Casati Milano atelier can perform the change during the fitting of the new strap.

Are there aftermarket straps compatible with the A. Lange & Söhne Lange 1 101.026?

Yes. The Lange 1 101.026 uses a standard 20 mm lug width, compatible with most quality aftermarket straps made to this size. Milano Straps offers a selection of artisanal 20mm straps in leather, alligator, nylon, and rubber compatible with this model, cut with precision to respect the tolerances of the original Glashütte lugs.

How long does a leather strap last on an A. Lange & Söhne Lange 1 101.026?

The lifespan of a leather strap depends on the quality of the leather, daily use, and exposure to moisture and perspiration. A first-choice box calf or alligator strap, with regular but not exclusive use, typically lasts between 18 and 36 months. Casati Milano straps are covered by an 18-month warranty against manufacturing defects and, thanks to selected leathers, develop a natural patina over time that increases their character without compromising their structural integrity.

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.

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The atelier's website: casatimilano.com