Strap for 1815 Chronograph Pink Gold

The lug width of the A. Lange & Söhne 1815 401.031 is 20 mm. This width is specific to the model and represents the ideal proportion between the case diameter (39.50 mm) and the strap. It is essential to verify this measurement before purchasing a strap, measuring internally between the lug bars.

For this pink gold chronograph, alligator in vegetable tanning, cognac or dark brown tones, offers the ideal combination of aesthetics and functionality. Alligator maintains tactile continuity with the warmth of pink gold and develops natural patina over time. Alternatively, grey pearl calf in vegetable tanning creates a sophisticated variant, whilst black FKM rubber ensures sporting versatility with deliberate contrast.

The process is straightforward: use a spring bar tool to compress the small metal springs (spring bars) that secure the strap to the lug bars. Insert the bifurcated tip of the tool under the pin, gently lift to release the old strap, then insert the new one by aligning the holes to the strap lug ends. Avoid abrupt movements to prevent damaging the case.

Yes, any strap designed for 20 mm lug width is compatible with the 401.031. You may choose from bespoke artisanal proposals and established brands, provided the strap strictly respects the 20 mm internal width. Milanostraps manufactures custom 20 mm straps calibrated to this geometry, with an 18-month warranty on manufacturing defects.

Durability depends on leather quality and usage. Premium alligator or shell cordovan in vegetable tanning lasts 5–8 years with moderate daily wear. Calf lasts approximately 3–5 years. Critical factors: direct sunlight exposure (accelerates ageing), humidity (swells fibres), and rotation frequency (rotated straps last longer than one worn continuously).