An Optional velcro strap in black or gray was made available – these straps hooked up to the initial male link with the bracelet. Fortunately, the fabric strap through the IW3715-36 and the alternate rubber strap from your IW3548 match the Aquatimer! However it seems to be the issue now https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/