This batch of cars were ordered in 1948 by the OKK from the Swiss industry (SWS, Giovanola). Apart from the 5 cars that went to RhB, cars also went to BVZ, FO, GFM, MOB and SchB.
Prototype picture of Uhk 897 on the MOB (originally delivered to RhB) Copyright Stefan Kyburz
Model
The basis for this kitbash are the inexpensive copies of the LGB cars produced by Newqida.