Geat Britain Coronation Cylinder 4 Nformation Request

Hi all,
In the S.G. 4Kings catalogue there is a note after the list of cylinders of the Coronation issue that reads as follows:-

Quote
It is believed that only 3 sheets were printed from cylinder 4 no dot with the ray flaw corrected.
A cylinder block and a vertical corner position strip of 3 showing the cylinder number and ray flaw corrected.
Unquote

Can anyone with previous editions of the catalogue check which is the earliest edition to carry this note?


It is in the eleventh edition October 1999 that I have but I cannot check earlier than that.
Any help appreciated

Regards
Ron.