The "Yverdon Krokodil", Ge 4/4 no 21 is built in the same style as the original "Crocodile" locomotives of the 1920s, but this narrow gauge small croc originates from 1950 and actually uses far more modern technology than its predecessors. It is the only real locomotive of what used to be YSteC. The Yverdon Krokodil is only 12,88 m long, but still weighs 41 tons. Its maximum speed is a modest 55 km/h, but in practise even that is a lot on the curvy tracks along the hillsides. Still in 1996 this locomotive had a fairly stylish 1950s creme and wine red finish, but afterwards YSteC had it repainted and cobered with stickers to look "modern". I doubt whether the new paintings are an improvement ?
In the background a brand new SBB "bullet train" of the ICN type.
Photo from Yverdon station at 1.11.2001 by Ilkka Siissalo,

Another view of the "Yverdon Krokodil" locomotive from 1950. The engine has been recently modernised and looks now completely different from how it had been shown in books (if you have a chance, see for example the excellent small book: K. Hartung: Kleine Typenkunde Schweizer Triebfahrzeuge, Transpress, Germany 1997). Its lamps were small and round and it definitely did not have a modern Einholm pantograph. Painting was wine red, with a stripe of cream on the sides: it looked older, yet more "serious" and somehow bigger. To say the least, more "serious".
Despite its wery short "network" of just 24 km of railroad line, YSteC actually had quite some cargo traffic, believe it or not. When the route was electrified in 1945 it soon turned out that in the post-war situation with not enough cars, the Be 4/4 EMUs could not take enough cargo, so this cargo locomotive was really needed in 1950. As shown in a separate picture, the YSteC manageed to take normal SBB cargo wagons on its narrow gauge rails by means of these "extra footware" (in German: Rollschemeln) and this locomotive. This explains the relatively active cargo traffic of for example timber trains on the YSteC line.
Photo from Yverdon station at 1.11.2001 by Ilkka Siissalo.

This (and also the picture of the YSteC "Yverdon Krokodil" locomotive) show how YSteC had been playing with colourings, not quite to the liking of everybody: The original 1980s style colouring had been totally spoilt by the childish graffiti-like taping. Is this good marketing ? This wagon is a small baggage department wagon, which is intended to be added to trains as needed to accommodate bicycles and other bigger baggage items.
Photo at Yverdon station from 1.11.2001 by Ilkka Siissalo.

YSteC managed to take "normal" SBB cargo wagons uphill along its narrow gauge route by putting these small "adapters" (German: Rollschemel) under the axles of the normal gauge wagons. They do the trick of fitting the wagons to only 1 meter gauge width. Other narrow gauge networks, for example SBB Brünigbahn, roll wagons on top of specially designed very flat wagons in order to have wide gauge tracks on the narrow gauge wagons; "train on train".
Photo from Yverdon station at 1..11.2001 by Ilkka Siissalo

The Vallée du Joux railway from Vallorbe to Le Brassus was always a private railroad, but for tens of years the federal railroads SBB operated it using old SBB trains in SBB paintings. That all changed when the railroad became a part of Travys. This train in itself has nothing new in it, it's an old SBB "Neue Pendelzug" (new pendeling train), riginally classed as SBB RBDe 560, now classed as Travys RBDe 568 and now painted in Travys' own colours.
Picture from Vallorbe 13.7.2007 by Ilkka Siissalo.

Another view of the Vallée du Joux railway RBDe 568 "Neue Pendelzug".
Picture from Vallorbe 13.7.2007 by Ilkka Siissalo.

Before its fusion as part of what is now Travys, the Vallée du Joux railraod was often referred to as PBR, Chemin de fer Pont–Brassus. This small diesel locomotive, or rather, officially a rail tractor of the type Tm 238 was owned by PBr. Here it was used for shunting at the Nestlé instant coffee factories in Orbe.
Picture from Orbe 13.7.2007 by Ilkka Siissalo.