Page 12 - Frank Walton GB Queen Elizabeth II Wildings

Perforation

The standard three perforation types shown on the previous page account for over 98% of issues. Type A is
found on 75.0% of different issues, Type B/C 19.6% and Type F(L) 3.6%. The two remaining types, E and H, are
each found on 0.8%. AE = Alternate Row Extension Holes.

Type E
Left pane (no dot) AE/I
Right pane (dot) E/I
Horizontal two-row comb

The no dot panes have an extension
hole only in every alternate row
on no dot panes. Dot panes are
indistinguishable from those from Type
A sheets.

Recorded only on 2d Cyls 7 & 9 and
2½d Cyls 32 & 37.

Type H
Left pane (no dot) E/I
Right pane (dot) P/I
Horizontal two-row comb

The dot panes have a perforated
left margin. No dot panes are
indistinguishable from those from
Type A sheets.

Recorded only on
3d Cyls 31, 36, 37 & 41.