The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.
Berlin newspaper reporting on Marzahn's 40th anniversary states the construction brigade Peter Zeises of VEB Wohnungsbaukombinat Berlin set the first panel of a QP 71/WBS 70 building at Marchwitzastraße on 8 July 1977.
Documents the WBS 70 prefabricated panel system used to build Marzahn and other large GDR housing estates from the late 1970s.[1]
States the first panel for Marzahn was set on 8 July 1977 by the Peter Zeises brigade of VEB Wohnungsbaukombinat Berlin, with topping-out on 2 September 1977 and first tenants moving in on 18 December 1977.[1]
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