An Optional velcro strap in black or gray was provided – these straps connected to the main male backlink in the bracelet. Thankfully, The material strap from the IW3715-36 as well as alternate rubber strap in the IW3548 match the Aquatimer! 3035 available a quickset day wheel, however the reference https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/