Hannover: Three generations of trams at Glocksee depot on April 20, 1997. To the left the last 3 of the 500 series (built 1961/2) trams await their farewell trip. In the middle two rows of the still actual 6000 (built 1974-93), and to the right a work car (salt waggon) which was rebuilt from a passenger car of the late 1920s. Photo by Sven Herzfeld (s.herzfeld@maschsee.han.de)