Mechanical SBB CFF FFS signal inside the transport museum in
Luzern. Distant signal type "Hippsche Wendescheibe". It can be
rotated and shows either the big orange disk (and by night, two
orange lights) meaning "next signal shows stop" or the two white
disks (and by night, two green lights) meaning "next signal is
clear".
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Luzern (Verkehrshaus), 2003-02-11
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photo: <a href="mailto:bilder@ralf-gunkel.de">Ralf Gunkel</a>