An Optional velcro strap in black or grey was available – these straps connected to the very first male hyperlink on the bracelet. The good news is, The material strap with the IW3715-36 along with the alternate rubber strap from your IW3548 match the Aquatimer! The Rolex Submariner was at https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/