An Optional velcro strap in black or gray was provided – these straps hooked up to the 1st male link with the bracelet. Luckily, The material strap from your IW3715-36 as well as the alternate rubber strap with the IW3548 match the Aquatimer! Unlock the value of one's treasured timepiece https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/