WAB BDhe4/4 - 121 --- This BDhe4/4 class railcar - 121 was built by a consortium of SIG, SLM, SAAS and BBC in 1970. It was later refurbished in 1998 and again in 2011. Fitted with Ub for control car operation with Bt 241-244 railcars 1 + GF + Coupling. Features like conversion to inverter drive, asynchronous motors are also there.

Framed by Asit Baran Das while this railcar with its trailer car Bt-243 was entering Lauterbrunnen station on 14th May 2015.