WW2 German 20mm x/ Flak?

Question - Over weekend , I picked up what I believe is a 20mm Flak casing. Lacuered steel, with belted case Headstamp is * eagle/WaA339 43 then fainter stamped 114. no other apparent markings. (headstamp maybe struck at angle. Is this for the 20mm Flakvierling 38? or the earlier Flak 30? case is bottle necked as well. Asking as this is out of my normal area of collecting.

The case will be the same for all guns in 20x138B.

Can you show us the headstamp?

have never tried posting a picture! will take one and try!