Strap for Seamaster 1948 Small Seconds Platinum / Silver / Alligator

The lug width of the Museum Collection 511.93.38.20.99.001 is 20mm. This dimension corresponds to the distance between the inner shoulders of the case lugs and determines the width of the compatible strap. To verify it, use a digital caliper measuring it perpendicular to the watch's longitudinal axis from inside to inside of the lug.

For a formal platinum watch such as the 511.93.38.20.99.001, black alligator or shell cordovan represent the most refined choices. Alligator offers durability and a characteristic grain that evolves with natural patina over time. Shell cordovan, with its polished finish, creates a sophisticated aesthetic contrast. For those preferring sustainability, Italian vegetable-tanned calf leather offers a unique and unrepeatable patina.

To change the strap, you will need a spring bar removal tool. Position the watch with the lug facing you, insert the tool into the small lateral opening of the lug and gently push downward until the spring compresses sufficiently to free the pin. Repeat for the other side. Make sure to use a new 20mm strap to ensure proper fit to the case.

Yes, it is possible to use high-quality aftermarket straps as long as they comply with the 20mm lug width. Milano Straps offers handcrafted 20mm straps selected and tested for geometric compatibility with the Omega 511.93.38.20.99.001. Ensure that the strap has no lateral play and that the visual proportions are consistent with the 38mm platinum case.

The lifespan of a leather strap depends on the tanning type and frequency of use. A high-quality alligator or shell cordovan, worn daily, maintains structural integrity for 3-5 years. A vegetable-tanned calf leather evolves naturally and, if cared for, can last just as long. Periodic maintenance—neutral cleaner and dry air—significantly extends useful life. The Casati Milano atelier provides an 18-month warranty on custom-made straps.