Strap for 1815 Up / Down Platinum / Silver

The A. Lange & Söhne 1815 221.025 features a lug width of 19 millimetres. This lug width, sometimes referred to as lug-to-lug measurement, is determined by the distance between the two lugs (the protruding parts of the case) where the strap attaches. Nineteen millimetres represents a classically refined proportion, perfectly harmonised with the case diameter of 35.90 millimetres in platinum.

For the 1815 221.025, we recommend premium leather straps: alligator for formal elegance, French calf for everyday versatility, or shell cordovan for those seeking a strap that develops patina over time. The 19-millimetre lug width also accommodates sport alternatives such as vulcanised rubber or fabric NATO straps, though the timepiece fully expresses its nature in classical formal configuration. MilanoStraps offers a comprehensive selection of 19mm compatible straps.

Strap replacement on the 1815 is accomplished using small spring bars positioned within the case lugs. Using a dedicated spring bar remover tool, apply gentle downward pressure to one end of the bar to release it from its seat. The old strap then slides away freely. To install the new strap, repeat the procedure in reverse, ensuring the spring bar is fully seated. We recommend caution to avoid scratching the platinum lugs: if uncertain, consult a qualified watchmaker or horologist.

A deployant clasp is not mandatory, but is highly recommended. The deployant—sometimes called a fold-over clasp—is a push-button mechanism that maintains the strap securely on the wrist and facilitates effortless donning without manual adjustment. For a timepiece of this refinement, a deployant clasp in white gold, platinum or steel completes the wearing experience. Straps fitted with a deployant are particularly advisable if you intend to wear the watch daily. Many owners maintain multiple straps: one with a deployant for intensive wear, and one with a traditional tang buckle for formal occasions.

The lifespan of a leather strap varies considerably depending on material type, frequency of wear and maintenance. A quality calf leather strap, with moderate use (2-3 days weekly), typically lasts 2-3 years. Alligator, owing to its robust grain structure, may endure 4-5 years. Shell cordovan ages gradually, developing an appealing patina, and can last 5-7 years with proper care. Vegetable-tanned leather, though more delicate than chrome-tanned alternatives, possesses an intrinsic beauty that improves with age. Casati Milano provides an 18-month warranty on manufacturing defects for all artisanal straps: personal consultation and early replacement are available at the Milan atelier by appointment.