Memminger

1920. As a consequence of big economic difficulties, the two largest breweries in Memmingen, namely “Buergerliches Brauhaus AG Memmingen” and “Engelbrauerei Memmingen Gebrueder Memmingen” merged to “Buerger- und Engelbraeu Aktiengesellschaft”. The board of directors was constituted by Albert Sayle and Hugo Bilgram.
1998.Foundation of the Memminger Brauerei GmbH & Co. Grundstuecks KG. on 08.09.1998 .Memminger Brauerei AG is the authorized signatory.

http://www.memminger-brauerei.de/ENG/e_brauerei/e_brauerei_historie.html

Т.е. кружка была выпущена, когда компания называлась Buerger- and Engelbraeu AG