The signal ZT5 (of the Ks system) in Düren seen from a train entering from the S-Bahn (urban trains) line on 12 December 2002. It shows Ks2 (expect stop), the yellow light seems a bit dark from this angle of view. On the top is a Zs3 (speed indicator) showing a "6" for a restriction to 60 km/h at this signal. Below is a Zs3v announcing a speed restriction of 40 km/h with a "4". This aspect (expect stop with 40 km/h) seems to be confusing, but the Zs3v relates to a single Zs3 between this signal and the next one. The small white light indicates a reduced distance, but I don't know if this relates to the single Zs3 or to the next signal.
Digital photo by Christoph Schmitz