An exciting area of collecting for clock and watch enthusiasts is literally opened up with this book. On the outside the automatic wristwatch is like its counterpart, but once the case is opened a different world appears. Here 200 watches are shown, each with three photos to show the dial, and the complete and partly disassembled movement. The book introduces all the Swiss manufacturers and provides an historical overview of the development of automatic watches from 1926 to 1978. Information on the functioning mechanism and construction of each design is offered along with the data needed to locate the watches chronologically.