The screen is unlaminated heavy card, with 3 panels of tables inside and 3 panels of art outside.
From the publisher's online catalog in 2000:
C&S Rebirth Deluxe Set
Three years in the making, twenty three years in the developing, this is the complete set of rules for Chivalry and Sorcery. Based on 3rd edition and incorporating the experiences not only of the designers but of the players themselves.