A. Lange & Söhne · Lange 1

Strap for Lange 1 Floral

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
Reference112.046
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 1 112.046

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Lange 1 112.046, seen from the bench

The Lange 1 was introduced in 1994 as the first model of the revived A. Lange & Söhne manufacture after German reunification. It features the manufacture caliber L901.0 hand-wound movement with hour, minute, small seconds, big date and power reserve indications. The watch has 20mm lugs and the asymmetric dial layout characteristic of the collection.

Frequently asked questions

What is the lug width of the A. Lange & Söhne Lange 1 Reference 112.046?

The lug width (strap width) of the 112.046 is exactly 20 millimetres. This means that the leather strap must have a lug passage measuring 20 mm to fit correctly onto the case lugs. Always verify this measurement before purchasing an aftermarket strap to ensure compatibility.

Which strap pairs best with the Lange 1 112.046 in rose gold?

The ideal choice is a high-quality Swiss or French alligator strap in dark brown or burgundy tones. Alligator respects the sophistication of the rose gold case through its fine grain and warm colour that harmonises rather than competes with the metal. Alternatively, shell cordovan with vegetable tanning develops a natural patina that ages beautifully alongside the rose gold, creating an authentic chromatic dialogue over time.

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

Strap changing requires a spring bar tool to gently release the elastic pins holding the old strap. Do not use hammers or improvised tools: the rose gold case is precious and the pins are delicate. If you lack experience, consult an authorised service centre or contact Casati Milano directly, who can complete the change in minutes and verify the lug passage of the new strap.

Can I use a compatible aftermarket strap on this Lange 1?

Yes, absolutely. A high-quality artisanal strap (alligator, shell cordovan, or premium calf leather) respects the value of the timepiece and offers aesthetic options that the manufacture rarely provides. Ensure the strap is crafted for 20 mm lugs and that the construction is fully hand-made: hand-stitching, clean finishing, and noble materials. Casati Milano produces bespoke straps custom-made for the 112.046.

How long does a genuine leather strap last on a watch like the Lange 1 112.046?

A high-quality leather strap (alligator, shell cordovan, premium calf) typically lasts 3–5 years with moderate daily wear. Longevity depends on sun exposure, humidity, and frequency of use. Shell cordovan is more durable thanks to vegetable tanning and can last 7–8 years. Casati Milano guarantees 18 months against manufacturing defects and offers reconditioning and replacement services.

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