An Optional velcro strap in black or gray was offered – these straps attached to the main male connection from the bracelet. The good news is, the fabric strap through the IW3715-36 as well as alternate rubber strap within the IW3548 in shape the Aquatimer! “Swiss Made” within the dial https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/