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Assembly time-lapse at the museum [1]. The elements just slide into place… They can be pulled out for maintenance even when the display is running.

Amazing you could hot-swap it even back then. I guess being able to change single rows when new stations get added and other things was a must.

That’s not how they work: each row must be able to display the same information as it will slowly shift towards the top of the billboard.

To add a new station (not such a frequent event in Switzerland) you need to modify the blades of -each- element.