ASW19 1:4 (3,75m) Wich one is it?

Hello!

Here Jaap from the Netherlands. My German writing is bad, so i'll write in English. Feel free to answer in German, i'll translate

I bought a second hand 1:4 ASW19 (i think...). Nobody knows who the manufacturer is. Maybe the German experts here can help me find it out..

Data i have:

GFK rumpf
GFK trachflacher
GFK leitwerke
3.75m span
Letters "MAG" on fuselage root airfoil
Ritz airfoil??

Anybody here some info? Thank you so much!

Nobody?? :'(

Could be WIK or Wantischek.........very old design. Ant.