Luftwaffe Contruction Unit Insignia

Triangular insignia worn by civilians assigned to the Luftwaffe Construction units where it was felt their expertise would be best utilised.
Comprising a black cotton backing with machine embroidered details in a silver grey rayon thread.
Produced in two sizes for wear on the breast or left sleeve, this is the smaller of the two which I take to be for wear on the breast.
Uniform removed and in very good condition with a small portion of the right extremity of the backing missing