History on the Rubbish Dump

While shooting industrial ruins for one of my projects I came across this interesting cardboard box, obviously from an era long past:

History on the Rubbish Dump
History on the Rubbish Dump

(Image Copyright 2013 © by Johann Brandstätter/ JB Photography)

I found this little piece of history on an empty lot behind the Central Railway Station in Sofia (the smoke stacks and cooling towers belong to the Sofia Thermal Power Plant).