An Optional velcro strap in black or gray was supplied – these straps connected to the initial male connection of your bracelet. Thankfully, The material strap within the IW3715-36 plus the alternate rubber strap in the IW3548 match the Aquatimer! The Royal Oak celebrates its 50th anniversary this year and https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/