Strap for Seamaster Aqua Terra 150M Master Chronometer Small Seconds 38 Sedna Gold / Diamond / MOP / Alligator

The lug width of this model is 19mm. This dimension is specific to maintain the correct aesthetic proportions between the 38mm case and the strap, ensuring a balanced visual ratio and precise wrist fit.

For Sedna Gold we recommend alligator in dark shades (chocolate brown, black) to let the warmth of rose gold predominate. Alternatively, vegetable tanned Italian calf leather that ages over time creates a patina complementary to Sedna Gold. Shell cordovan is ideal for those seeking maximum durability over the decade.

The Aqua Terra 220.58.38.20.55.002 uses standard spring bar attachments. Position the watch with the case facing upward, locate the small cylindrical hole on the lug (inner side), insert a spring bar tool to release the spring, remove the old strap by pulling it downward. Then reinsert the new strap by aligning the pins to the seats and press until you feel the spring snap into place.

The 19mm size is standard for several 38mm Omega models (Seamaster, some Globemaster). However, always verify the lug width of your specific model before purchase, as construction variations may require 18mm or 20mm. Always consult official specifications.

A quality artisanal alligator or calf strap lasts on average 5-7 years with regular use. On a sports watch exposed to water and perspiration, longevity depends on the tanning: vegetable tanned leathers require protection from excessive moisture, while shell cordovan resists beyond a decade if maintained. Casati Milano warranty is 18 months on all artisanal straps.