An Optional velcro strap in black or grey was available – these straps hooked up to the primary male link on the bracelet. The good thing is, The material strap in the IW3715-36 and the alternate rubber strap in the IW3548 in good shape the Aquatimer! To rejoice the Submariner’s https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/