Hi Marcus and others here.
I am wondering if there are any updates on this issue?
My interest in this stems from research on Frantisek Zemek and on the Teplice area.
I have found a series of references to the Loewy works at Tischau:
Glashüttenwerke - Emmahütte, G.m.b.H., Tischau
Glasshüttenwerke Emmahütte Otto Löwy & Co, G.m.b.H., Tischau
Sklárna huť Emma, Otto Löwy a spol., spol. s r. o., Mstišov
Sklárně Otto Löwy Tischau / Mstišov,
Otto Löwy a spol., spol. s r. o., Mstišov
Sklárny Löwy Otto a spol., Mstišov
AND
Mstišov, Tischau, Stalag IVC, Zajatci byli přiděleni v březnu 1941. Ubytováni v bývalé sklárně Emmahuette. Pracovali na uhelném dole Karel.
Mstišov, Tischau, Stalag IVC, Prisoners were assigned in March 1941. Housed in the former Emmahuette glassworks. They worked at the Karel coal mine.
I have read that it was mostly Soviet prisoners who were housed in the sklárně Emmahuette. The property was confiscated in 1940.
I am not sure when Otto Loewy and his partner went to England but from reading above it must have been in the early 1930's.