An Optional velcro strap in black or gray was available – these straps hooked up to the 1st male backlink of the bracelet. The good thing is, the fabric strap through the IW3715-36 as well as the alternate rubber strap from the IW3548 in shape the Aquatimer! The Rolex Submariner https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/