Certina watches prices3/16/2024 Modern sapphire crystals, for example, are so shatter-resistant that they can easily outperform acrylic crystals, while requiring much less material thickness. Watch movements today are so sturdy and cases are of such high quality that they make the historical DS principles unnecessary. An extra-thick acrylic crystal and a reinforced, fully threaded, screw-in back are two elements in the design that enhanced the security of the original model and reappear in the contemporary DS PH200M, our test watch. Since 1959, along with an Incabloc shock-protection system, the elastically suspended movement has been part of Certina’s DS (Double Safety) concept, hence the two letters that serve as the name for the brand’s extensive DS collection. Just like the version from the ’60s, Certina leaves a narrow gap between the case and the dial, which is connected to the movement, to provide space for the slight motions permitted by the elastic rubber ring. As in the original construction, the movement is borne atop a thick rubber ring that cushions it against shocks. The DS PH200M’s similarities to its predecessor not only apply to its design but also continue into its interior.
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