An Optional velcro strap in black or gray was offered – these straps hooked up to the initial male connection on the bracelet. Fortunately, the fabric strap within the IW3715-36 as well as the alternate rubber strap within the IW3548 in shape the Aquatimer! If the Rolex Submariner ref. 116610LN https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/