At this time, the end of the sixth millennium and the fifth millennium BC, the first Neolithic cultural groups appear in Egypt. The quantity of archaeological finds does not yet allow us to trace the merging of the Epipaleolithic traditions of the Nile Valley with the cultures of immigrant groups.
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A chronograph is a specific type of watch that is used as a stopwatch combined with a display watch. A basic chronograph has an independent sweep second hand; it can be started, stopped, and returned to zero by successive pressure on the stem. More complex chronographs use additional complications and can have multiple independent hands to measure seconds, minutes, hours and even tenths of a second. In addition, many modern chronographs use moveable bezels as tachymeters for rapid calculations o