hi no gr?f&stift was the general importeur from austria they defenatly made there own cbriolet. ithink they only built about 10 cars.a friend told me there is no documentation left, they get rid of it when they moved to another place. i think that maybe hainzinger and metalex had a cooperation.
ther was also a small manufacture for 4 door cabriolets in bad ischl austria 