Firmly Sticking Postage Stamp: self-adhesive postage stamp which can not striped without damages caused by an error |
Double Transfer: postage stamp that shows evidence of a (partly) duplication in the design caused by an error |
Chalky Overprint on Reverse: postage stamp caused by an error with chalky overprint on reverse instead on front |
Missing Chalky Overprint: postage stamp caused by an error without chalky overprint |
Double Chalky Overprint: postage stamp caused by an error twice chalky overprinted |
Missing Matrixcode: postage stamp caused by an error without matrixcode |
Missing Pre-Cancellation: postage stamp caused by an error without pre-cancellation |