Brand: Gulpener (Korenwolf).
Producer: Gulpener Bierbrouwerij.
Description: Dark blue crown cap. Image of a hamster (korenwolf) and label in black and white. White text: KORENWOLF Waere Witte.
Plastic line.
Factory sign: R.R.K. (Rauh GmbH & Co. Blechwarenfabrikations-KG).