“These are such comfortable straps. I bought the anthracite 20mm for my Seiko SPB313 and it was a little narrow. Not a deal breaker, but it made me thing the 20mm might fit my 39.5 Planet Ocean with its ‘Why Omega? Why?’ 19mm lugs. Even though the navy blue strap was wider than the anthracite tropic, and much truer to the 20mm claimed size, it still fits. The pattern carrying on over the lug end of the strap works well as you can see the pattern instead of a seam where the pattern ends. It’s a comfy classic.”
