An Optional velcro strap in black or grey was presented – these straps attached to the first male backlink with the bracelet. Thankfully, The material strap from the IW3715-36 and also the alternate rubber strap with the IW3548 in shape the Aquatimer! Rolex would make over 1M watches a year, https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/