Dungeon Masters Screen (4th Printing), accessory for AD&D 1st edition
“This second edition of the Dungeon Masters Screen has been redesigned for better clarity and quicker reference. this package consists of two durable 11″ x 25″ folding cardstock screens for the DM’s reference in playing Advanced Dungeons & Dragons games. One screen contains the Combat and Saving Throw Tables and the other contains the Psionic Combat Tables and miscellaneous information. These screens are useful for shielding maps and other game materials from the players when placed upright, and also provide instant reference to the charts and tables most commonly used during play. The players’ side is printed with Experience Tables and the Weapons Table as well as being colourfully illustrated. These folders have been varnished on both sides to protect them against common wear and tear. This (and only this) screen contains all the official AD&D statistics and tables.”
The Acaeum description of fourth printing DM’s Screens says that the screens “are varnished on both sides, and are now both 11″x25″ (a version has been reported with varnish on one side of the screen only)”. This is one of those versions with varnish on one side of the screen only.