Perforations: Good perf means almost equal perfs on both sides and if there is no trace of a perf I describe it as trimmed straight. Just OK means that in my opinion there are sufficient perforations, do ask for a scan if it is important to you. Hopefully any other descriptions are clear as being between these descriptions.
QEII - Machin Booklets - 50p Folded
50p Gilbert and Sullivan No 2. Pirates. Missing phosphor
booklet FB52 pane UMFB46. Missing phosphor but poor perfs on left, supposedly less than fifty copies of this booklet MP exist.
50p MCC No 3 Lords Pavilion. Error.
booklet FB41 pane UMFB42ca. Error, 1p SBR, 13p SBL Phosphor synchronisation. New Phosphor ink. Perfs good.
50p Aircraft No 1. Armstrong and de Havilland. Cover fault.
booklet FB55 pane UMFB47. Cylinder pane B1 B3 trimed straight left. Cover fault.
50p Pillar Box. Phosphor error
booklet FB38 pane UMFB34. Perfs just OK.
50p Gilbert and Sullivan No 3. Mikado
booklet FB53 pane UMFB46. Short bands on bottom two stamps. Perfs just short on right.
50p Commercial Vehicles No 1.
booklet FB3B pane UMFB6. Perfs good. 7p left band
50p Botanical Gardens No 3 Lillum. Error Orange cover.
booklet FB45a pane UMFB41. Quite different from the normal shades seen. Correct spelling "Mount Stewart". Imperf.
50p Aircraft No 2. Viscount and Comet. Cover flaw
booklet FB56 pane WP797. Cover flaw with vapour trail from tail of comet. Left perfs trimmed straight.
50p Pond Life No.1. Star underprint.
booklet FB32 pane UMFB38. Perfs good.
50p Gilbert and Sullivan No 3. Mikado. Perf "Type P"
booklet FB53 pane UMFB46. Perfs good.