Through the Furka Base Tunnel it reaches the Goms District area and Brig in the canton of Valais.

Construction work resumed, now with important federal funds, and on July 4, 1926 regular through services between Brig and Disentis could start.

In 1930 the tracks of the newly electrified BVZ reached Brig, which gave birth to the famous Glacier Express.

Some of the large luggage and mail vans were rebuilt as passenger coaches, some became covered goods wagons.

FO always suffered from not having really enough vehicles but was lucky having two neighbouring companies where additional rolling stock could be leased for peak traffic.

Later, two more locomotives were delivered by SLM and MFO The 1961 merger with Schöllenenbahn enlarged stock by Finally, after the merger, FO could begin with the modernisation of its rolling stock and took delivery of 1971/72 FO took delivery of 4 push-pull consists with motor luggage vans, one additional motor to compensate for the loss of locomotive 35, destroyed in a head-on collision, and four additional driving trailers to form small push-pull consists with the existing motor coaches 41–45.

With the opening of the new Furka tunnel approaching, the wooden coaches had to be replaced and the number of vehicles extended.

A new livery in red with a white stripe was introduced and within a few years extended to existing modern rolling stock.

For the Furka tunnel car shuttle trains, FO took delivery of A little addition could be made some years later, but the coaches now came from ACMV Vevey Finally FO got panoramic coaches as developed by MOB There was no departmental stock for a long time except for one snow plough, introduced 1917.