Salvaged piece during the restoration of the Hero 4 Foot Jupiter 2 miniature prop circa 1992.
One of the three landing gear foot pad doors located on the belly of the hull of the Jupiter 2 miniature.
Accompanying photos of the Jupiter-2 Autopsy video, showing the location of this foot pad door.
Youtube link to Glimpse of the Hero Jupiter 2 Restoration Process done in the 1990s.