Brand: Zwettler Dubkles.
Producer: Brauerei Zwettl - Karl Schwarz GmbH.
Description: Metallic red and white crown cap, golden circle. Gold and white logo with red letter: Z. Metallic red text: Zwettler, white text: Dunkles.
Plastic line.
Factory sign: R.R.K. (Rauh GmbH & Co. Blechwarenfabrikations-KG).