An Optional velcro strap in black or gray was available – these straps connected to the main male url of your bracelet. Fortunately, the fabric strap through the IW3715-36 plus the alternate rubber strap from your IW3548 suit the Aquatimer! Along with the remarkably corrosion-resistant 904L stainless-steel (labeled as “Oystersteel” https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/