In search of the Jet phosphor

On the ½p, they all are from stamp books with panes DP11 or DP13. All should have the top, right or bottom perforations “cut.” A combination of right and top or bottom also is possible.

On the 1p, they all are from stamp books with panes DP12. All should have the right perforations “cut.” Some also have the bottom perforations cut.

On the 1½p, they all are from stamp books with panes DP12. All should have the left perforations “cut.” Some also have the bottom perforations cut.

On the 2p, they all are from stamp books with panes DP11. All should have the left perforations “cut.” Some also have the bottom perforations cut.

On the 2½p with centre phosphor bar, they come from stamp books with panes DP14. All should have the top, right or bottom perforations “cut.” A combination of right and top or bottom also is possible. They also exist from sheets.

On the 2½p with left phosphor bar, they come from stamp books with panes DP9. All should have the right perforations “cut.” They, also, should have the top or bottom perforations “cut.”

On the 3p, they come from stamp books with panes DP6, DP9, and DP10. All should have the top or bottom perforations “cut.” Some, also, have the right perforations “cut.” They also exist from sheets.

Since all seem to be from counter sheets, only the 2½p, 3p, 4p, 6p, and regionals in your post can have Jet-phosphor.