Omega
Speedmaster Reduced 3802.77.55— lug 18mm

The lug width is 18 mm. This width is proportionate to the 39 mm case diameter and ensures the aesthetic balance of the model. To verify, remove the original strap and measure the internal distance between the two lug holes on the case.

There is no single "best" option, but rather contextual choices. Mahogany alligator offers formal elegance; vegetable-tanned calf combines versatility and natural aging; shell cordovan conveys evening refinement; grey NATO maintains functional sportiness. The choice depends on your primary use and personal aesthetic preferences.

Obtain a spring bar tool. Position it horizontally under the lug from the inside of the case, gently compressing the internal spring. The lug will detach, allowing you to remove the old strap. Align the holes of the new strap with the lug, insert the spring bar, and press until you hear a slight 'click' confirming secure attachment.

Yes, any strap with an 18 mm lug width is compatible. Opt for straps from specialized ateliers that guarantee precise tolerances, professional finishing, and the use of premium leathers. Always verify that the lug is fitted with sturdy spring bars, not improvised rivets.

A quality alligator or shell cordovan strap, with moderate use (4-5 days weekly), maintains structural integrity for 5-7 years before requiring replacement. Vegetable-tanned calf lasts 3-5 years with frequent use, developing a patina that enhances its character. Durability depends on exposure to sweat, humidity, and frequency of strap rotation.