This is the patented folding map, with ISBN 3884450166. This ISBN includes multiple editions from about 2000 onwards, and the content varies considerably between editions. For example, all the bus numbers have changed - as I found out when I arrived in the city with an old edition of the current ISBN. If possible, please separate your copy from here, and combine it with the work for the appropriate edition. The edition number is printed with the year and copyright details on the bottom margin of the main map.