An Optional velcro strap in black or gray was made available – these straps connected to the very first male connection of your bracelet. The good thing is, the fabric strap through the IW3715-36 along with the alternate rubber strap with the IW3548 fit the Aquatimer! Rolex's legendary dive watch https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/