Hipp reversible disk signal
This type of signal was developed by the inventor and watchmaker Matthäus Hipp[1] and first used in Winterthur in 1862.
The Hipp reversible disc signal is mounted on a hollow cast column.
It is also noteworthy that the Hipp reversible windows were equipped with an electrical feedback signal.
The design as a distant signal was basically the same, the disk was green until 1935, then orange instead of red and mostly only had a lantern on it, which showed a double light via a mirror system.
From 1904 almost the entire network was gradually equipped with such entry signals, which were improved in some points.
A signal that had been shut down remained on the RhB line Davos - Filisur at the western end of the Wiesener Viaduct.
Perhaps also because Ernst Ludwig Kirchner immortalized this signal in his picture "The bridge near Wiesen", examples can be found near the Rhaetian network.
The Bridge near Wiesen (1926).
The Hipp reversible disk (top left on the edge of the picture) indicates to the train the narrow side or the small wings.