A. Lange & Söhne · Lange 1

Strap for Lange 1 Moonphase Yellow Gold

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter39 mm
Reference109.021
FamilyLange 1
MovementA. Lange & Söhne caliber L901.5 Hours, Minutes, Small Seconds | Big Date | Moonphase | Power Reserve Indicator
CaseYellow 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 1 109.021

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Lange 1 109.021, 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 features the in-house manufactured caliber L901.5 manual-winding movement with indications for hours, minutes, small seconds, large date, moon phases, and power reserve. The case presents the characteristic asymmetrical layout of the dial with decentralized function displays.

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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Casati Milano · Via XX Settembre 15, Milan · by appointment only