Omega
Museum Collection 516.53.37.20.09.009— lug 19mm

The lug width of the 516.53.37.20.09.009 is 19.00 mm. This measurement is the construction standard of the case and must be strictly respected when selecting a strap. A lug width of different dimensions (18 mm or 20 mm) would cause wearing instability and mechanical stress on the case lugs.

Authentic alligator is the most natural formal choice for this model. The structured grain of the leather dialogues elegantly with the brushed finish of the gold, creating micro-variations of reflection. High-quality alternatives include vegetable-tanned calf leather for a softer aesthetic, or genuine shell cordovan, which develops an extraordinary amber patina over time.

Lug width is measured by positioning a digital caliper perpendicularly between the two lugs of the case, at the point where the strap connects to the metal. For the 516.53.37.20.09.009, the distance must be 19 mm. Alternatively, you can measure millimeter by millimeter on the inner surface of the lug using a precision ruler. It is essential to exclude the internal metal lugs from the measurement.

Yes, if made with equivalent craftsmanship. Alligator straps from premier tanneries, such as those offered by Casati Milano in the 19 mm size, maintain standards of nobility comparable to the gold case. Quality depends on the selection of raw hides, tanning technique, and precision of finishing. Straps made with vegetable-tanned leather or authentic shell cordovan guarantee durability and dignified patina.

An authentic alligator or shell cordovan strap lasts an average of 4-6 years of daily wear, with variability based on frequency of use, sun exposure, and humidity levels. Vegetable-tanned leather tends to mature positively, developing patina and controlled stiffness. Calf leather straps, more delicate, require replacement every 3-4 years. Wear is not deterioration: it is the visual narrative of the object.