5.0 Rulebook
From AmtWiki
Preceded by 4.0 Rulebook. Superseded by 6.0 Rulebook.
The rulebook in play around 1987.
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