An Optional velcro strap in black or grey was offered – these straps connected to the main male backlink from the bracelet. Luckily for us, The material strap in the IW3715-36 plus the alternate rubber strap in the IW3548 suit the Aquatimer! Once the Rolex Submariner ref. 116610LN was launched, https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/