Strap for Seamaster Aqua Terra 150M Master Chronometer 34 Sedna Gold / Diamond / Wave Sapphire / Alligator

The lug width of this model is 16mm. It is measured by positioning a caliper between the two internal metal shoulders of the case, from wall to wall. Note: the external width of the spring bar passage is usually 0.5-1mm greater than the internal functional width.

Medium brown alligator (cognac) creates an elegant monochromatic pairing that replicates the warmth of gold. For those preferring contrast, a vegetable-tanned calf in burgundy or cherry red shell cordovan offer sophistication. In summer, a NATO in white linen and navy blue cotton evoke the collection's nautical origins.

Omega supplies spring bars on this model. Using a spring bar tool, gently bend the pin to release the case from the old strap, then position the new strap by inserting the pin until you feel the locking click. If unsure, Casati Milano offers strap change service by appointment in Milan.

Any strap with a 16mm lug width is compatible: alligator, calf, shell cordovan, cotton, linen, silicone rubber, and NATO. The 16mm strap market is less saturated than 20mm, so we recommend verifying availability before ordering, or opt for customization at Casati Milano.

A vegetable-tanned leather strap lasts 3-5 years with daily wear, developing a characteristic patina. Alligator and shell cordovan, due to leather density, can reach 6-8 years. Factors such as humidity, perspiration, and frequency of use affect durability. Casati Milano's warranty covers 18 months against manufacturing defects.