An Optional velcro strap in black or gray was provided – these straps hooked up to the first male connection of the bracelet. Fortunately, The material strap with the IW3715-36 as well as the alternate rubber strap from the IW3548 match the Aquatimer! But it really appears to be the https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/