Handcraft!! 18mm Black Genuine Leather Watch Band Strap With Alligator Crocodile Grain & 16mm S/S Deployment Clasp for Omega Planet Ocean Seamaster Speedmaster 100% Hand Made & Hand Stitch as Usual No Machine This strap is made by genuine cow leather , it will be soft after using . It fits the watch with 18mm lugs,the deployment is made by Top Grade Swiss Stainless Steel. Special for Omega, Longines watches The long part of the strap is 125mm, the short Part is 75mm(the lenght of the buckle is not included).