A. Lange & Söhne · Lange 1

Strap for Little Lange 1 Moonphase White Gold - Diamond / MOP

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

Lug width20 mm
Case diameter37 mm
Reference819.048
FamilyLange 1
MovementA. Lange & Söhne caliber L901.9
Year2009 - 2010
CaseWhite 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 1 819.048

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Lange 1 819.048, seen from the bench

The A. Lange & Söhne Lange 1 819.048 in white gold represents contemporary Saxon craftsmanship at its finest. This 36.80 mm model features the L901.9 caliber movement and embodies the brand's founding principle of functional asymmetry through its sunburst silver dial, blued hands, asymmetric date window at 1 o'clock, and visible tourbillon. The white gold case with satin and polished finishes develops a refined patina over time, while the sapphire crystal and 30-meter water resistance reflect the watch's philosophy as a daily refined companion. The 20 mm lug width is precisely engineered for this compact diameter.

Frequently asked questions

What is the lug width of the A. Lange & Söhne Lange 1 819.048?

The A. Lange & Söhne Lange 1 819.048 features a lug width of 20 mm. This measurement is specific to the model and is essential to ensure proper strap fitment. Always measure the internal distance between the case lugs before ordering a compatible strap.

Which strap is most suitable for the Lange 1 819.048 in white gold?

For the white gold 819.048, we recommend vegetable-tanned alligator in black or dark brown for elegant contrast, or burgundy shell cordovan for patina development over time. Vegetable-tanned calf leather offers a smooth texture that complements the geometric lines of the case. Avoid ostentatious straps — the watch speaks for itself.

How do I change the strap on my Lange 1 819.048?

The strap is changed using a spring bar remover to extract the pins fastening the strap to the lugs. Insert the tool into the side aperture of the lug, gently push to compress the internal spring, and withdraw the pin. For installation, insert the new strap pins into the case lugs, ensuring they are perfectly seated.

Can I use an aftermarket strap on my A. Lange & Söhne Lange 1?

Yes, provided it is 20 mm compatible. For a watch of this luxury category, we recommend artisanal straps in noble leather (alligator, shell cordovan, vegetable-tanned calf) with a deployante in white gold or brushed steel, respecting the aesthetic authority of the Lange 1.

How long does a leather strap last on the Lange 1 819.048?

A quality leather strap (alligator, shell cordovan, or vegetable-tanned calf) typically lasts 3-5 years with daily wear, depending on sun exposure, humidity, and maintenance. Vegetable-tanned leather develops patina over time. Casati Milano guarantees 18 months against manufacturing defects and recommends periodic maintenance to extend strap lifespan.

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