A. Lange & Söhne · Saxonia

Strap for Datograph Platinum / Black / Bracelet

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
Reference403.435
FamilySaxonia
MovementA. Lange & Söhne caliber L951.1 Hours, Minutes, Small Seconds | Big Date | Chronograph, Column wheel, Flyback
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 Saxonia 403.435

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Saxonia 403.435, seen from the bench

The A. Lange & Söhne Saxonia Chronograph features the in-house caliber L951.1 with flyback chronograph and column-wheel functions. The dial displays hours, minutes, small seconds and the large date characteristic of the Saxon manufacture. The watch is equipped with 20mm lugs and a high-precision chronograph movement.

Frequently asked questions

What is the lug width of the A. Lange & Söhne Saxonia 403.435?

The 403.435 features a 20-millimetre lug width. This measurement allows the use of universal 20mm aftermarket straps, ensuring full compatibility. Lug width is measured from the inner edges of the lugs where the spring bars connect to the case.

Which strap should I pair with the platinum Saxonia 403.435?

For platinum, we recommend leather straps in British calf or crocodile in neutral tones: deep brown, black, or charcoal grey. Crocodile grain emphasises the case texture, whilst warm calf balances the material's coolness. Avoid vibrant colours that conflict with the watch's restraint. For sporty contexts, a charcoal NATO maintains formal elegance.

How do I change the strap on the Saxonia 403.435?

Remove the lugs using a spring bar tool positioned perpendicular to the pin, applying gentle outward pressure. Once the pins are extracted, the strap releases automatically. Insert the new strap, aligning the inner holes with the pins, and press until the spring bars click into place. Always verify stability before wearing. We recommend consulting a qualified watchmaker to avoid case scratches.

Can I use a third-party strap on my Saxonia 403.435?

Yes, any aftermarket strap with a 20-millimetre lug width is compatible. However, we strongly recommend choosing materials and finishes equivalent to the watch's quality: a platinum Saxonia deserves straps in genuine crocodile, shell cordovan, or vegetable-tanned calf. Budget leather straps in chrome-tanned leather visually and tactilely diminish the ownership experience.

What is the lifespan of a leather strap on a daily-wear watch?

A quality leather strap worn daily typically lasts 3-5 years. Longevity depends on humidity, sun exposure, wear frequency, and tanning method. Vegetable-tanned crocodile outlasts rapid-tanned calf. Periodic maintenance—wiping with a damp cloth and conditioning with specialist creams—significantly extends life. We recommend always keeping a backup strap.

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