FYI this is for VEB Wolfen, an East German company, but ran in a Polish magazine.
"It's never too early to discover the world."
LTU: LTU Lufttransport-Unternehmen GmbH was an airline with its head office in Halle 8 at Düsseldorf International Airport in Düsseldorf, Germany; it is now fully owned by Air Berlin. The initials stand for the German phrase LuftTransport-Unternehmen. (Wikipedia)