44M Lidérc (ghost, wisp) AA rocket. Second AA rocket in the world but the first one which used an igniter activated by the target itself as German AA rockets were activated by impact or a timer. The carrier aircraft would have been the Me 210 Ca-1 - only one could be fitted on one plane - and the target would have been the carpet bombing Allied bombers flying in close formation, the planned objective was to disrupt their missions by breaking up their formations and not the destruction of individual planes.
The designer of the igniter was Pulváry Károly (in esperanto: https://eo.wikipedia.org/wiki/K%C3%A1roly_Pulv%C3%A1ry) physicist, mechanical engineer, sound engineer who made his invention to be activated by the sound of motor of the bombers.
50 pieces were made but - as far as I know - none had the igniter as there was no capacity to manufacture them. They were used as anti-personnel rocket propelled explosives against the Red Army around Budapest.
No American bomber was harmed in the making of this rocket.