Reading the time

The time is read from a number ring. The intersection of the left shadow limit to the number ring shows the time. The time is shown in MET or MEST. The right shadow limit is not considered. On June 21, the winter roller must be substituted with the summer roller. On December 21, the summer roller must be substituted with the winter roller. In this way, the time equation is compensated throughout the year. Daylight savings time (summer time) is represented by a second, smaller number ring. During this time of year, reading is done from this number ring.