Don't rush like that! Today is a public holiday :-)
There were 5 copies in total, built for the Hamburger Hochbahn AG (HHA). They were decommissioned in 1957 and sold to a scrap dealer. The Erfurter Verkehrs-AG (EVAG) bought them from him and converted them into single-deckers. They remained in service until 1965.
Two photos: before / after.
The second photo shows the front part of a very interesting motorbike: BK 350: two-stroke boxer engine, 350 cc, 17 hp.