Jan 20, 2018 - 10:43 PM
in reply to rockoyster
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See attached. Read all the way to the bottom.
I tried tolookit up, but could not quickly find anything.
Here is my interpretation.
Starting a few years ago, the conductors no longer could sell you a ticket after you were on board the train. It became necessary to have either a ticket or railpas or both s before you got on board; previously, you could hop on and pay the conductor.
I think that
"Buy your ticket on the train ( with supplement)"
means that you have the unusual privilege of being able to buy your ticket on the train, but you will have to pay extra, as a supplemet to the regular ticket price.
That is my best guess.
The coverage map would probably give a clue, too.
https://www.myswissalp s.com/swisstravelpass/ validity
It shows that the STP is valid, as you note.