An Optional velcro strap in black or gray was available – these straps hooked up to the first male connection of your bracelet. The good news is, the fabric strap from your IW3715-36 and also the alternate rubber strap from your IW3548 match the Aquatimer! The Rolex Submariner was at https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/