Third Overprint Quality: subjective perception of a third overprint quality
perfect centered third overprint
very good centered third overprint
good centered third overprint
slightly off centre third overprint
somewhat off centre third overprint
clearly off centre third overprint
Third Overprint Quality Grades: subjective perception of a third overprint quality in different grades and conditions
Faultless Third Overprint: third overprint without conditional of manufacturing or wrong handling originated quality defect