I have old plastic microphone, but it has no brand or model written on it.
it has only this: 908 106/9 Made in Austria
maybe it is AKG?
I'd be surprised if it was AKG, but I don't have a better guess. You can enter it under https://www.gearogs.com/maker/31909-No-Brand at the moment if you like.
I found it, it's AKG D5S/08 from 1974. !
Nice one! How did you find out?
browsing all models of akg microphones... it took a while
Cool! Was that online, or in a catalog?