An Optional velcro strap in black or grey was available – these straps hooked up to the 1st male connection on the bracelet. The good news is, the fabric strap from your IW3715-36 and also the alternate rubber strap from the IW3548 suit the Aquatimer! Rolex's famous dive watch stays https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/