This photo shows the ancillary maintenance area at Wasserkuppe. It was taken in 1974. Equipment through door is a GPA-98 and height finder (FPS-6 ?) In foreground is an OA-99 PPI ( I think) and just showing on the right is the edge of the T-6 (??) film simulator. If anyone who was at the Wasserkuppe knows for sure, let me know.