While trying to document my collection, I came across this old posting and the discussion about the signature of Erwin Eisch.
In 2002 or 2003 I visited the Eisch glassworks in Frauenau during our family holidays.
The glass museum was closed that year, but to make a long story short: because we were interested in the work of Erwin Eisch, we got a private guided tour by -I think- Erich Eisch through the the Erwin Eisch Retrospective in the museum gallery, the glassworks and we visited also the Sommer-Akademie sponsered by Eisch.
In the gallery, we bought this studio piece signed E Eisch. I suppose this piece is actually made by Erwin Eisch and that it has his signature at the bottom.