An Optional velcro strap in black or gray was offered – these straps hooked up to the primary male url in the bracelet. The good news is, The material strap from your IW3715-36 plus the alternate rubber strap within the IW3548 match the Aquatimer! Rolex can make over 1M watches https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/