Handcraft!! 18mm Black Alligator Crocodile Grain Genuine Leather Watch Band Strap & 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 IWC,Omega, Cartier, Longines watches