An Optional velcro strap in black or grey was made available – these straps hooked up to the 1st male backlink on the bracelet. Fortunately, the fabric strap with the IW3715-36 plus the alternate rubber strap with the IW3548 in shape the Aquatimer! There exists a beautifully unique double index https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/