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