An Optional velcro strap in black or gray was supplied – these straps attached to the first male link of your bracelet. Luckily, The material strap within the IW3715-36 and also the alternate rubber strap in the IW3548 healthy the Aquatimer! Christie’s This was mostly a ref. 6538 — it https://www.watchesworld.com/frozen-in-time-luxury-watches-for-winter/