An Optional velcro strap in black or gray was supplied – these straps hooked up to the first male website link of the bracelet. The good thing is, The material strap in the IW3715-36 as well as the alternate rubber strap from your IW3548 in good shape the Aquatimer! Rolex https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/