Omega
Speedmaster Broad Arrow 3555.55.00— lug 20mm

The lug width is exactly 20mm. This measurement is critical for compatibility: straps of 18mm or 22mm will not fit correctly onto the case lugs. You can verify the measurement by measuring the internal distance between the outer edges of the lugs with a ruler.

Black or dark brown alligator is the most coherent formal choice, offering clean visual contrast with the dial. For sports or weekend wear, vegetable-tanned calf creates natural patina over time. Dark blue or black racing rubber straps maintain the motorsport heritage, while avoiding NATO fabrics with distracting patterns.

Position the watch on a stand with the dial facing downward. Locate the suspension pins (small metal bars) that connect the lugs to the case. Use a dedicated pin remover tool or similar instrument to push the pin laterally until it is completely released. Insert the new strap in the same direction and reinsert the pin until you hear the locking click.

Only straps with 20mm lug width are compatible. Major artisanal manufacturers offer this width in alligator, calf, shell cordovan, and rubber. Always verify the vendor's specifications before purchasing. Custom made-to-measure straps ensure better fit to the specific lugs of this Omega reference.

A high-quality artisanal leather strap lasts on average 3-5 years in daily use, depending on the tanning method and material. Alligator tends to resist longer thanks to the natural hardness of the leather. Vegetable tanning ages visibly, creating patina, but remains functional. The standard warranty is 18 months; natural wear and fading are excluded from coverage.