The Ysgarth 5th Edition was published in 1985 and consisted of three letter-sized saddle-stapled booklets:
The 5th Edition was reprinted in 1987 with black and white covers.
The Ysgarth Rules System has a complex publishing history with several versions (and several revisions within versions) and small print runs.
For a discussion on the "editions" of Ysgarth, see A look at the evolution of the game
A microbadge is available: