An Optional velcro strap in black or grey was provided – these straps attached to the 1st male link on the bracelet. Thankfully, The material strap in the IW3715-36 plus the alternate rubber strap in the IW3548 healthy the Aquatimer! Rolex makes around 1M watches a 12 months, but even https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/