An Optional velcro strap in black or gray was made available – these straps attached to the main male url from the bracelet. Luckily for us, The material strap with the IW3715-36 along with the alternate rubber strap from the IW3548 suit the Aquatimer! When the Rolex Submariner ref. 116610LN https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/