5.0 Rulebook
From AmtWiki
The rulebook in play around 1990.
Main differences between 5.0 and 6.0 were that back then, Bards didn't have a regular spell list, instead had a bunch of non-magical abilities. When the conversion came to 6.0 they also had to pay spell points for their weapons, which was a major change for them, as before they could take whatever they wanted without reducing their spellcasting.
This was the last time any classes had guildmaster perks. 1987 5.0 PDF 1993 5.0 PDF