An Optional velcro strap in black or grey was offered – these straps hooked up to the main male connection of the bracelet. Luckily, the fabric strap from your IW3715-36 as well as alternate rubber strap from your IW3548 in shape the Aquatimer! The Royal Oak celebrates its 50th anniversary https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/