The 900 DIAPAL combines several SINN technologies, which in their totality guarantee the highest level of reliability in terms of time measurement and functionality. Of particular note here is theDIAPAL technology for a lubricant-free anchor escapement . This is documented by the letteringDIAPAL on the anthracite-colored dial. Due to this extraordinary technology, we give a five-year guarantee on the 900DIAPAL