Strap for Speedmaster Day-Date 39 Red Gold / Black

The lug width of the Omega Speedmaster 3623.50.01 is 18 millimeters. This measurement refers to the distance between the inner points of the upper lugs of the case. An 18mm strap fits perfectly without angular play, maintaining comfortable wearability on the wrist.

For the 3623.50.01 in rose gold, we recommend a dark brown Crocodile Porosus alligator strap, which creates an elegant contrast with the warmth of the gold case, or a shell cordovan strap that develops a deep, warm patina over time, naturally complementing the gold.

Strap replacement is done by removing the pins or spring bars located at the lugs. Use a dedicated forked tool to gently push the pin laterally, freeing the old strap, then insert the new one by aligning the holes with the lugs. A straightforward operation, though we recommend caution to avoid scratching the case.

Yes, absolutely. Milanostraps offers artisanal 18mm straps compatible with your Speedmaster, crafted from noble materials and customizable. The important thing is to verify that the lug width is actually 18mm and that the spring bars are the correct length.

Durability depends on the material and usage. A quality alligator strap can last 5-8 years, and shell cordovan even longer thanks to the fibrous nature of the leather. Vegetable-tanned leather generally requires replacement every 3-4 years with daily wear. Factors such as humidity, perspiration, and sun exposure affect longevity; regular maintenance with specific creams significantly extends useful life.