Certina Watch DS-1 Powermatic 80 C029.807.11.031.02. This models are inspired by the first DS concept timepieces that Certina produced in 1960. They combine a distinctive design and sophisticated retro details with an innovative automatic movement and a power reserve of up to 80 hours. 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.