This badge was made in the Soviet Baltics and is a nice quality with that lively / childish picture of a crane loading items on a boat. Not sure of the significance...what's humorous is that the designer managed to misspell "friendship" in German. The correct spelling is "Freundschaft" with a "c."
Thanks, that's definitely possible especially with the image of a crane. Generally speaking, I've seen the expression "Bridge of Friendship" used to describe physical bridges between two friendly countries but also there's the Socialist use of the expression to describe diplomatic relations. For example, there's this Komsomol / FDJ badge. (with the correct spelling :) )
The "Bridge Of Friendship" was a maritime trade route (more likely routes) that primarily imported Soviet goods into the GDR to bolster the regime. I think it was around 6 Million Tonnes in 1984 alone.