Omega
Constellation 131.10.28.60.11.001 (aka: 13110286011001)

The lug width of the Constellation 131.10.28.60.11.001 is 20 millimetres. This dimension represents the distance between the strap attachment pins on the case. It is a classic standard for medium-sized watches, perfectly proportioned to the 28 millimetre case diameter.

There is no universal choice, but it depends on use: cognac or black alligator offers maximum elegance for formal occasions. Vegetable-tanned calf guarantees everyday versatility and develops a captivating patina. Shell cordovan creates a sophisticated mahogany-red contrast against the steel. A grey-blue NATO is ideal for casual summer wear.

The Constellation 131.10.28.60.11.001 requires extracting the attachment pins using a dedicated tool or the back of a ballpoint pen. Position yourself at a table with frontal lighting, support the case, apply gentle and constant pressure on the pin until it comes out. Insert the new strap by aligning the holes, reinsert the pin with millimetre precision. If you prefer certainty, contact a qualified service centre.

All quality 20 millimetre straps are compatible, provided the attachment width corresponds exactly. Verify that your strap has lugs (the small rings) of 20 millimetres or the correct opening for straight pins. Avoid generic straps from low-cost retailers: millimetre precision prevents play and premature wear on the pins.

A quality leather strap lasts 3-5 years with moderate daily use, depending on ambient humidity and care. Alligator and shell cordovan resist more than raw calf. Vegetable tanning develops patina and can last over 5 years if treated periodically with specific conditioner. Straps made by Casati Milano include an 18-month warranty against manufacturing defects.