A. Lange & Söhne · Saxonia

Strap for Grand Langematik Pink Gold / Black

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

Lug width20 mm
Case diameter41 mm
Reference309.031
FamilySaxonia
MovementA. Lange & Söhne caliber L921.4 Hours, Minutes, Small Seconds | Big Date
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 Saxonia 309.031

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Saxonia 309.031, seen from the bench

The A. Lange & Söhne Saxonia 309.031 is a 40.50 mm rose gold timepiece embodying Dresden watchmaking tradition through elegant simplicity and European classical design. It features the manually wound L921.4 caliber with Saxonian decoration visible through the transparent caseback, offering hours, minutes, small seconds, and a large date function. The 20 mm lug width is precisely calculated to integrate the strap without compromising visual balance or wearing security.

Frequently asked questions

What is the lug width of the A. Lange & Söhne Saxonia 309.031?

The Saxonia 309.031 features a lug width of 20 mm, specifically calibrated for this reference. Measurement must be taken internally between the spring bar seats with millimetre precision. A strap of different width (18 or 22 mm) will not fit correctly into the case lugs.

What is the best strap for the A. Lange & Söhne Saxonia 309.031?

For the Saxonia 309.031 in pink gold, alligator is the noblest choice, followed by vegetable-tanned calf and shell cordovan. These materials respect the dress watch character of the case and harmonise beautifully with the patina of pink gold. Avoid NATO straps or rubber, which would contradict the formal vocation of the piece.

How do I change the strap on my A. Lange & Söhne Saxonia 309.031?

The strap is replaced by carefully removing the spring bars with a professional tool, available in dedicated kits. For a Saxonia of this calibre, it is advisable to entrust the operation to a qualified watchmaker, avoiding damage to the pink gold case. Casati Milano also provides this service in their atelier.

Does a quality aftermarket strap for the Saxonia 309.031 compromise the piece's value?

No, if constructed to equivalent standards and with noble materials (alligator, calf, cordovan). A high-quality strap—produced by specialised manufactories—actually represents an aesthetic and comfort improvement, provided the original strap is retained. Reversibility is always a recommended practice for collectors.

How long does a leather strap last on the A. Lange & Söhne Saxonia 309.031?

A high-quality leather strap (alligator, cordovan, vegetable-tanned calf) typically lasts 3-5 years with constant daily wear, depending on climate and frequency of use. Leather fears excessive humidity and prolonged dry heat. Casati Milano provides straps with an 18-month warranty on manufacturing defects and recommends periodic maintenance with natural oils.

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