Prosper, Forgive late reply. I thought I had responded earlier.
That is eerie , I had an uncle there at the same time your grandfather was there. This is why I asked about the school because I am trying to trace my uncles footsteps. He was with a Gebirgs Rgt.
He was captured in Czech. in July 45. and sent to "Stalinsk" where he was released in 1949.
Thanks for the information.