An Optional velcro strap in black or gray was made available – these straps attached to the main male connection with the bracelet. Luckily, The material strap from the IW3715-36 as well as alternate rubber strap from your IW3548 in good shape the Aquatimer! Sited on the previous Chapel Court https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/