Brand: Rosen.
Producer: Rosenbrauerei Pößneck GmbH.
Description: Brownish metallic crown cap, golden circle, yellow/brown arms shield with a yellow/brown rose, letter "R" in brown/red on the top.
Identification: RRRR.
Plastic line.
Factory sign: R.R.K. (Rauh GmbH & Co. Blechwarenfabrikations-KG).