Hi
If its from the 80's, 90's itll be a screwed and epoxy bonded frame, as are the Vitus from the sames years (mix of carbon and aluminum)
The frames are supposedly prone for coming apart, though I cant see how if they are screwed into place?
Ive been after one for years, seen one in Manchester recently though I declined from purchasing it for £500 as it needed so much work and money to get it like I wanted
Pics would be nice