A. Lange & Söhne · 1815

Strap for 1815 Tourbillon Platinum

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

Lug width20 mm
Case diameter40 mm
Reference730.025
Family1815
MovementA. Lange & Söhne caliber L102.1 hours, minutes, small seconds | tourbillon escapement
Year2014
CasePlatinum

Spring bar

Swiss Standard universal spring bars

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

Straps for the 1815 730.025

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The 1815 730.025, seen from the bench

The A. Lange & Söhne 1815 730.025 is a platinum tourbillon watch with a 39.50 mm case diameter and 20 mm lug width. It features the manual L102.1 caliber with tourbillon and lever escapement, hours, minutes, and small seconds on a silvered dial. The platinum case reveals the movement through a display caseback showing the asymmetric white gold rotor, exemplifying Glashütte watchmaking principles of precision and geometric sobriety without superfluous ornamentation.

Frequently asked questions

What is the lug width of the A. Lange & Söhne 1815 730.025?

The lug width of the A. Lange & Söhne 1815 730.025 is 20 millimetres. This measurement represents the physical space between the lugs on the case and determines which strap is compatible with your timepiece. For precise measurement, use a digital calliper and measure the width of the space between the lug pins on the case itself.

Which strap is recommended for the 730.025?

The ideal strap for the A. Lange & Söhne 1815 730.025 is crafted in natural brown alligator, vegetable-tanned calf leather, or structured rubber. Given the geometric severity and platinum construction of this reference, we recommend materials of artisanal excellence with finishes designed to develop natural patina. Avoid synthetic finishes or lower-grade leathers that would compromise the aesthetic and functional value of the timepiece.

How do I change the strap on the 730.025?

To change the 730.025 strap, use a dedicated watch pin removal tool. Position the timepiece on a stable support, then gently push the pins outward using the pin tool's slot. Perform this operation with extreme care to avoid scratching the platinum case. If you are not experienced, we recommend entrusting the operation to professionals such as Casati Milano, who ensure precision and case protection.

Is an aftermarket strap compatible with the 1815 730.025?

Yes, any strap with a 20-millimetre lug width is compatible with the 730.025. However, select brands of recognised artisanal quality: the constructive quality of your A. Lange & Söhne deserves a strap realised with equivalent dedication. Milanostraps offers curated 20mm straps, crafted by specialised artisans who guarantee durability, finish and aesthetics consonant with the value of your timepiece.

What is the lifespan of a leather strap for the 730.025?

A high-quality leather strap (alligator, vegetable-tanned calf) worn daily has an average lifespan of 3 to 5 years before requiring replacement. Lifespan varies depending on environmental humidity, frequency of wear, and maintenance. Casati Milano straps include an 18-month warranty against manufacturing defects. With appropriate care (periodic cleaning, moderate humidity exposure), you can extend the strap's useful life beyond 5 years.

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