An Optional velcro strap in black or grey was offered – these straps attached to the primary male hyperlink of the bracelet. Luckily, The material strap from the IW3715-36 along with the alternate rubber strap through the IW3548 match the Aquatimer! , Rolex. Always a reputation to reckon with, Rolex https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/