An Optional velcro strap in black or gray was offered – these straps connected to the main male connection of the bracelet. Thankfully, The material strap through the IW3715-36 as well as alternate rubber strap in the IW3548 suit the Aquatimer! , Rolex. Constantly a reputation to reckon with, Rolex https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/