Morning Ingo,
300446 unknown
EC-KDV is hex 3423D2 so 3440C7 is unknown
3C1190 comes out as D-EVQX unknown, miscode?
3C492A comes out as D-ABIJ, a 727 broken up long ago, miscode?
3C5EF4 comes out as D-AGWT unknown, miscode?
3CEE59 comes out as D-CROJ unknown, miscode?
3D0590 comes out as D-EAIY which was a Grob G 120A which became 4X-DGK. Could this be a Grob test registration re-issued?
Have a good day and thanks
Alan