Strap for Constellation Co-Axial 38 Stainless Steel / Yellow Gold / Silver Lozenge

The lug width of the Constellation 123.20.38.21.02.009 is 20 millimetres. This measurement is specific to the 38 millimetre case diameter version and is essential for selecting a compatible strap that will not create excessive play or stress on the attachment pins.

The best strap depends on your intended use. For maximum formal elegance, alligator in dark brown (cognac) enhances the yellow gold and balances harmoniously with the steel. For everyday versatility, calf leather with natural patina offers the best aesthetic compromise. For those who appreciate traditional artisanal craftsmanship, shell cordovan guarantees incomparable density and colour evolution over time.

The strap is attached to the lug via removable pins. Position the watch face down on a soft surface, locate the metal pin protruding from the base of the lug, and using a dedicated spring bar tool apply pressure from both ends to release the pin from the strap. Remove the old strap, insert the new one by aligning the pin at the end, and push until you hear a click. Verify that the strap is securely fastened before wearing the watch.

Any strap constructed for a 20 millimetre lug width is compatible with this Constellation. Custom artisanal straps offer maximum freedom of choice in terms of leather, colour, thread and finishes. Milanostraps provides a complete collection of 20mm straps ready to use or customisable at the Casati Milano atelier with precise measurements and sartorial details.

A quality leather strap, subject to regular use and ordinary maintenance (periodic cleaning, drying after water contact, protection from excessive heat), has an average lifespan of 3-5 years. This period can extend to 7-8 years with greater care, or shorten if constantly exposed to moisture or heat. Vegetable tanning and shell cordovan, in particular, develop a patina that improves aesthetically over time and can last even longer if treated with care.