Used attributively to describe something that has been printed over or relates to an overprint.
Translations
Collectors prize overprint errors that make the overprint text appear upside-down.
Les collectionneurs apprécient les erreurs de surimpression qui font apparaître le texte surimprimé à l'envers.
Relating to or featuring an overprint; printed on top of an existing image or text. Collectors prize overprint errors that make the overprint text appear upside-down.