Certina Watch DS Prime Lady Shape C028.310.16.116.00. The ladies quartz models are as precise and reliable as the mens, with personalities ranging from the very sporty to the more classic and elegant. These watches are equally at home with evening wear, plain dress or in dramatic mountain bike descents. All feature high quality and durability in a dynamic design, thanks to a 316L stainless steel case, a sapphire crystal, water resistance up to a pressure of 10̴Ì_bar and a proven ETA quartz movement.