A. Lange & Söhne · Lange 1

Strap for Kleine Lange 1 20th Anniversary Pink Gold

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

Lug width19 mm
Case diameter36 mm
Reference811.064
FamilyLange 1
MovementA. Lange & Söhne caliber L901.0 Hours, Minutes, Small Seconds | Big Date | Power Reserve Indicator
CasePink Gold

Spring bar

Swiss Standard universal spring bars

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

Straps for the Lange 1 811.064

Selected for the 19 mm lug width · workshop selection

All 19 mm straps →

The Lange 1 811.064, seen from the bench

The Lange 1 was introduced in 1994 as the first model of the revival of A. Lange & Söhne after German reunification. It is powered by the manufacture caliber L901.0 with hour, minute, small seconds, big date, and power reserve indication. The lugs measure 19mm in width.

Frequently asked questions

What is the lug width of the A. Lange & Söhne Lange 1 ref. 811.064?

The lug width is 19 millimetres, measured between the two lugs of the rose gold case. This specification is critical for ensuring that an aftermarket strap seats flush against the case lugs without lateral play or misalignment.

What is the best strap choice for the A. Lange & Söhne Lange 1 811.064?

The optimal choice is alligator crocodile leather in mid-range quality, in cognac or shell-brown tones. The chromatic resonance with rose gold is historically established and visually harmonious. An alternative of equivalent prestige is vegetable-tanned Italian calf, which offers a drier texture and more pronounced ageing characteristics.

How should I properly change the strap on an A. Lange & Söhne Lange 1?

Position the watch on a leather cushion to prevent scratches. Use a dedicated spring bar tool to compress the internal spring locking the strap to the lugs. Insert the tool into the small holes inside each lug, compress gently until the strap releases, then repeat on the opposite lug. Align the new strap with the lugs and allow the spring to reposition naturally.

Is a 19mm aftermarket strap from a third-party manufacturer compatible with the Lange 1 811.064?

Yes, provided the strap is specifically dimensioned to 19 mm lug width. Technical compatibility is determined by lug width alone, not by brand. However, we recommend verifying that the strap is constructed from quality materials equivalent to the watch—alligator, shell cordovan, or vegetable-tanned leather—to honour the premium nature of the timepiece.

What is the typical lifespan of a leather strap on an A. Lange & Söhne Lange 1?

A professionally crafted alligator or calf strap has an indicative lifespan of 5 to 7 years under daily use. Longevity depends on solar exposure, humidity, and frequency of strap rotation. Leather ages rather than deteriorates, developing patina and character. Minimal maintenance—occasional cleaning—significantly extends serviceable life.

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