Technical Archive

A. Lange & Söhne
Lange 1 722.050— lug 20mm

A. Lange & Söhne Lange 1 722.050: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.

Lange 1 Tourbillon Homage to F.A. Lange

Artisanal Note

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

Technical Specifications

A. Lange & Söhne 722.050
Lug Width
20 mm

The essential strap measurement.

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Reference

722.050

Movement

A. Lange & Söhne caliber L961.2 Hours, Minutes, Small Seconds | Big Date | Power Reserve Indicator

The Heritage

The A. Lange & Söhne Lange 1 722.050 is a masterpiece of modern German watchmaking, launched in 1994. It features an asymmetric dial with date window at 12 o'clock, small seconds at 6, and power reserve at 10. The case measures 38.50 mm in Honey Gold, with 20 mm strap width. The L961.2 calibre combines manual winding with automatic function, offering hours, minutes, date, and power reserve display visible through the sapphire caseback.

FAQ

What is the lug width of the A. Lange & Söhne Lange 1 722.050?

The A. Lange & Söhne Lange 1 722.050 features a lug width (measuring distance between the lugs) of 20 mm. This dimension is consistent across all construction variants of this model and is compatible with any strap specifically manufactured for 20 mm lugs.

Which strap pairs best with the Lange 1 722.050 in Honey Gold?

For the 722.050 in Honey Gold, we recommend alligator straps in dark brown or medium-dark chocolate tones, which create warm contrast with the gold; calfskin with vertical grain in similar shades for daily versatility; shell cordovan in burgundy or cognac for those desiring accelerated patina and vintage character. Avoid cool chromatics (blue, grey) that clash with the gold's warmth.

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

The Lange 1 strap is changed via standard spring bars (lug bars). Using a spring bar removal tool, press the internal pin to release, withdraw the bar from its seat, and insert your new strap. For models equipped with a deployante clasp, ensure the replacement strap includes an equivalent mechanism or transfer the original deployante from your previous strap.

What is the typical lifespan of an artisanal leather strap on the Lange 1 722.050?

A strap crafted from superior leather (alligator, shell cordovan, vegetable-tanned calfskin) typically lasts 3–5 years with daily wear, subject to climate, humidity, perspiration, and maintenance. Leather ages naturally, developing patina and character; structural deterioration advances more slowly on vegetable-tanned leathers. Casati Milano guarantees 18 months against manufacturing defects.

Is a 20mm strap compatible with watches other than the Lange 1?

Yes. Any wristwatch with a 20 mm lug width is compatible with straps designed for this dimension. Always verify your model: consult original documentation, measure the lug-to-lug distance directly, or contact your brand's customer service to confirm compatibility before purchasing.

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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By appointment only · Milan

The atelier's website: casatimilano.com