Are these the same vehicles? http://fotobus.msk.ru/vehicle/369154/#n524322

I'm not sure if this vehicle is really the former school bus from Roeser because I think I have already seen a picture of the Thomas et Piron vehicle on the net when the Roeser-Van Hool was standing in Wickrange on the former 'Rolinger'-territory.

I'm also not shure.
It could also be this one http://fotobus.msk.ru/photo/735048/
I'm pretty shure it was an ex-schoolbus; there are some common items. One thing is rather sure; before the red Thomas+Prion colours the bus was painted in orange. The roof of the bus is still orange.

Now I'm sure that's former BU 555 because of a difference in the body between the front and the rear axle. Thank you marc_1604 for the information!

Now there's only one thing unclear: who was it from 1984 to 1995?

Must have been CFL but we don't know the running number.