An Optional velcro strap in black or gray was available – these straps attached to the main male url with the bracelet. Luckily, The material strap from the IW3715-36 as well as alternate rubber strap within the IW3548 match the Aquatimer! “Swiss Made” to the dial of the watch - https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/