Certina Watch Heritage DS PH200M C036.407.11.050.00. With the DS PH200M, Certina has resurrected a 1960s model which was inspired by the depths of the ocean. The new edition represents a seamless continuation of a timeless design, combining it with an automatic calibre of the latest generation. ADDITIONAL STRAP, this watch offers the wearer a varied wardrobe, customers purchasing this watch will receive a second strap. The sophisticated quick change system allows you to replace the strap easily and without the need for any tools, meaning you can change your look in an instant.