Early 2cm FlaK ( one seems to be dated '38 or 9, the other possibly '40 ? ). Condition is rather poor, they look to have been ground-dug and then polished. I'm assuming the one with the complete primer is deactivated (?).
The shells are not too uncommon to come by... The heads are a bit hard to find! Nice ones anyway!!
The top ones are not ground dug, that green stuff is uneven copper oxidation not coherent with soil oxidation. They look nice.
They had been in a rather unattractive piece of trench art. The bases had been inside apiece of wood and had been in an attic or barn in the north country for decades. I am dropping them off at my gunsmith to make sure they are safe. I know all the power inside is gone and the heads had been drilled on the sides, but as for the fuse and the primer, he can render it safe or ditch it if its to much of a problem