thanks - although your image is small and allows for little magnification, I'd suggest we can see sufficient to avoid the need to re-photograph on a larger scale. It's probably my eyesight, but did wonder if there was some sort of central cartouche which included letters or words - though am sure you would have mentioned this had that been the case.
Regret I'm none the wiser as to helping with maker or origin, though that impression of circles made by the mould is something I've seen before, somewhere.
About the only thought I can offer would be a suggestion that your glass might possibly date to somewhere between mid 1960s to c. 1980 - clear-cased coloured glass with moulded textured appearance seems to have been not uncommon during that period.
Do you know if there is an active, specifically German based glass forum such as the GMB? There is a sub-section for Germany here on the GMB, but apparently it doesn't allow requests for id.