QSL card that doubled as Eastern Bloc blanket advertisement

Here's a dandy QSL card for ham-radio operator DM2AOL that also served as an advertisement for Blankets of Kirschau in the German Democratic Republic (East Germany, 1949–1990). Perhaps this was one of the few avenues they had at the time to spread the word about Eastern Bloc goods and services.

If I'm reading the information on the back of the card correctly, the contact (QSO) occurred in 1979. There's no stamp or address, so this card was possibly mailed in an envelope.

This additional information about the company appeared on the back of the card:

Blankets of Kirschau
from:
VEB Vereinigte Grobgarnwerke
DDR-8604 Kirschau
Exporteur: Textilcommerz
DDR-108 Berlin P.O.B. 1206.

Searching these terms, I discovered some photographs of a mid-century textile company, some provided by the German Federal Archive, in the Wikipedia Commons. Here they are:

Bundesarchiv, Bild 183-P0425-0008 / Häßler, Ulrich / CC-BY-SA 3.0 [CC BY-SA 3.0 de]

Deutsche Fotothek‎ [CC BY-SA 3.0 de]

Sludge G [CC BY-SA 2.0], via Wikimedia Commons

Beyond that, though, I don't know much about this company, so it's a bit of a mystery. Help from overseas would be very welcome!