Strap for Seamaster 300 Master Co-Axial Steel Stainless Steel / Sedna Gold / Strap

The lug width of this model is 21mm. This dimension is specific to the Seamaster 300 41mm two-tone Sedna/steel and is not compatible with standard 20mm or 22mm sizes. To measure accurately, use a digital caliper and measure the internal space between the lugs where the strap sits.

For this two-tone configuration, alligator remains the historical choice—its regular grain and natural lustre dialogue perfectly with the gold without visual contrast. Alternatively, French calf with vegetable tanning offers flexibility and natural aging. For those seeking pure sportiness, NATO cotton canvas or vulcanized FKM rubber guarantee resistance in marine environments.

Strap replacement is performed via the spring bars that secure the strap to the case lugs. Use a spring bar tool to compress the spring, remove the old strap and insert the new one. The procedure requires gentle pressure and a clean workspace to avoid scratches on the case. If unsure, contact an authorized Omega service centre.

No. The Omega Seamaster 300 233.22.41.21.01.002 has a strictly 21mm lug width. A 20mm strap will leave visible side gaps; a 22mm will not fit correctly into the case lugs. The 21mm specification requires dedicated straps, available on milanostraps.it in the selection for this size.

A genuine leather strap (alligator, calf, shell cordovan) typically lasts 3-5 years with daily use, with variability linked to climate, frequency of water exposure and care. Humid climates and frequent immersion reduce durability; rapid drying and periodic conditioning extend it. All straps on milanostraps.it include an 18-month warranty against manufacturing defects.