You mean ARIEL from Sweden with a demo 1984?Great band if so.
METALL when had that girl?Coz the trx i have say it's from 87-89.
Ariel from Canada I mean...had an LP in 1986. A few songs have backing or semi leadvocals done by a chick.
And Metall had female vocals on the track "Heisse Sprueche" which must be from early 1986 or even 1985. You can see the chick on some of the early pic's too, nice looking.
was of the same kind like Metal Lady from Hungary or Tanja from Czech Rep. The material was written by any producer or musicians (of Metal bands) and she only sung the vocal parts.
There's also another female fronted Metal from Czech Rep, Ina & Ring
. But their LP is from 1991 so it won't fit in your timezone, but they prohably started in the late 80's - nice Metal though.
Also don't forget czech Loretta
, but I've necer heard any of their demos so their LP was released too late for your project.