From the outset, there were problems with printing this issue as there are a number of missing colours present, in some cases more than one colour, indicating poor quality control. Some of the missing colours are now very difficult to find as in some cases only few stamps on a sheet were affected, generally 10 or less. Many of these varieties were the result of one of the printing colour supplies being interrupted during the print run and restarting, causing a missing colour on one or more columns.