An Optional velcro strap in black or grey was presented – these straps hooked up to the 1st male url of the bracelet. The good news is, The material strap in the IW3715-36 plus the alternate rubber strap from the IW3548 in shape the Aquatimer! “Swiss Made” to the dial https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/