Private purchased light-weight tropical field blouse with insignia for a Nachrichten Leutnant (or Polizei)

Private purchased light-weight tropical field blouse with insignia for a Nachrichten Leutnant. The owner was most probably from Austria  since his tailor used light-green Austrian cloth. This makes this tunic quite unusual but still definitely period time. Cut with an open collar. Originally attached feldgrau buttons.  Hand-attached officer's breast eagle. Lining made from tunic fabric with stitching lines typical for Austrian tunics. Loops for a ribbon bar which is still in place. Medium size. Almost no traces of wear. The tunic may be never badged, and it can be originally tailored for a combat police unit, just rebadged by a previous collection holder