I have a salver in the same colour and with an identical swirl, and I know for a fact that mine is from Joska Kristall in Northern Bavaria. The woman I bought it from bought it at the factory shop.
I am not inferring yours is from the same source, you could only safely say that if you had them side by side, but chances are quite high.
datewise I would say late seventies, early eighties.
Joska is a bit of an attraction park and bus stop, and they also sell glass they bought in. I doubt if they kept registers of production models - but maybe they did....