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