If you buy a ticket
- From Montreux
- To Interlaken Ost
- Via Zweisimmen
it is the ticket for the Golden Pass. You can also buy it from the ticket office, by doing so you will get the correct ticket.
It is recommended to make a seat reservation for CHF 9.00 per seat. You can make the reservation on the Golden Pass MOB Website: https://journey.mob.ch/en/routing
A ticket is not required to make a seat reservation, the ticket you can still buy before departure.