A very small distant signal repeater of the Ks system seen at track 4 in Köln-Ehrenfeld on 21 July 2002. On the right is the Zs3v used to announce speed limits, this one can show a "6" for 60 km/h. These additional indicators are normally fiber optic displays like here. What is very uncommon is that the signal head on the left is also a fiber optic display. At the moment it shows Ks2 (expect stop, the yellow light) with an additional white light indicating that this is a repeater. The Zs3v is dark. As this signal is mounted underneath the platform roof, there is not much space, this is also the reason why the Zs3v is not placed under the signal head as usual.
Digital photo by Christoph Schmitz