Only having the Brian Davis 2 vol. books on the Luftwaffe I cannot find these 2 insignias..

The black I know is for Construction battlions. They came in 2 sizes,,why? where on the shirt were they worn? I'd like to know some more info on these units.

Same with the yellow patch. Proper unit name?For the arm? or breast? What type unit wore these?
*Any information appreciated...,G.

anyone with info on the Yellow piece??

G...Its not in vol.1 either.The eagle in the cogwheel (eagle facing the other direction)is for Civilian Technicians.Its on visor hats in Vol.1 of Headgear of Hilters Germany.Dont have a clue what the initials are.

Thanks Rick..Civilian Techs,,good.
I keep hearing Goring has something to do with it [other than just being Luft.],,gotta find something somewhere...thanks again..,G.

The first one is for Luft employed civilian construction workers..the second is for Luftwaffe General Luftzeugmeister GL (LW technicians-procurement personnel) both are breast eagles..

Thanks Kursk!