They are providing the specific revisions: Lunar Lander, Warlords (Rev D), Black Widow (Rev A), Gravitar (Rev C), and Major Havoc (Rev D). And their site also

They are providing the specific revisions: Lunar Lander, Warlords (Rev D), Black Widow (Rev A), Gravitar (Rev C), and Major Havoc (Rev D). And their site also states "These boards use the original bill of materials, follow the original schematics, and can be used to replace damaged original boards by using the original parts from these boards."