A total of six (6) sheets of 2½d Prussian Blue stamps are known to have been printed, of which 4 were issued to Postal Offices. In addition to the colour printing error a number of other interesting "errors" are noted with these stamps. One finding is that two sheets had control and cylinder numbers visible on both sides of the sheet whilst two other sheets had no control or cylinder numbers on them at all.
The Great Britain 1935 Silver Jubilee stamps were printed in sheets of 120 stamps (20 rows x 6 columns). Normally two sheets of 120 stamps were printed at a time i.e. each revolution of the printing cylinder produced a double pane of stamps. Division arrows set up between the two sheets indicated where the sheets were to be guillotined for the separation. Control numbers were printed opposite Row 18 and are usually found 3mm from the stamp. The control number for the 1935 Silver Jubilee issue was W/35. The cylinder number (in this case 34) indicated whether the sheet was the left or right hand sheet. The cylinder number 34 no dot indicated the sheet was the left hand sheet, whilst the cylinder number 34. (dot) identified it as the right hand sheet. The 2½d stamp had a single cylinder number, whereas the rest of the 1935 Silver Jubilee stamps used more than one cylinder number.