Bombardier has opened the doors of its Villeneuve site in Switzerland to reveal the new double-deck, intercity EMU it is supplying to SBB.
It is the first time Bombardier and SBB have shown off the interior of the new Twindexx Express IR train.
The first two pre-series vehicles have now completed static testing at Villeneuve and are due to begin trials on the SBB network.
Between now and the end of next year, seven more pre-series trains will complete an extensive testing programme, first at Villeneuve and then at the Velim test track in the Czech Republic.
Bombardier is building 200 of the double-deck units for SBB, of which 59 will be with the Swiss operator by the end of 2019.
Timetabled services are due to begin in 2017.
The new trains will operate north-south services, meeting the predicted demand created by the commissioning of the Gotthard and Ceneri Base Tunnel.