Stamp from booklet pane. Imperforate at top and right.
Die I: three thick coloured lines between "“P”" and ornament at left. Short line in ball-ornament.
Stamp from booklet pane. Imperforate at bottom and right.
Die I: three thick coloured lines between "“P”" and ornament at left. Short line in ball-ornament.
Die II: four thick coloured lines between "“P”" and ornament at left. Longer curved line in ball-ornament.
Perforated official, "O.H.M.S"
5 holes in vertical bars of H.
Perfin can exist in eight different orientations
Experitzation highly recommended - forged perfins common