Hi everyone! I just got old german bike, don't know anything about it and would like to find out. if anyone has an idea or information about it, please share. The mark on bike says 'Garantiert Handgelotet - ZR - Made In W. Germany' ... Here are pics. Thanks in advance

http://i1084.photobucket.com/albums/...9/DSC00503.jpg
http://i1084.photobucket.com/albums/...9/DSC00501.jpg
http://i1084.photobucket.com/albums/...9/DSC00500.jpg
http://i1084.photobucket.com/albums/...9/DSC00499.jpg
http://i1084.photobucket.com/albums/...9/DSC00498.jpg