Martin, you are correct that there is not a diagram of perf E in Vol 4, Part 1. Part of the reason for this is that perf E was never used on QEII panes from stitched booklets between 1952 and 1975. If you want an actual diagram, go to Vol 2, Appendix 1 which shows perf E (noting it was originally ca...

Martin, simple answer is that no one knows why they used a different sheet perforator resulting in change from perf I to perf P. But, the point is that the single value stamps were printed and perforated in the reel with the reel perforator imperf on outer edges and single perf every four rows betwe...

Mike, there is no single reference to booklet preparation and make up but all the components are well known. Obviously, this differs depending on which booklets you want to look at - stitched up to 1975, with panes of 2, 4, 6 or 15 then folder books etc from then on. I am not about to write a thesis...

Firstly, as a message to all members, every time a new edition of a Specialised Catalogue is proposed by SG, a team of GBPS members provides philatelic input which is usually much greater than individuals can do. So, as regards the recent Specialised Vol 1, Part 1, that was lead by Howard Hughes wit...

You need the Bookmark Catalogue which was published by the Great Britain Decimal Stamp Book Study Circle, 7th edition 1999 with 2000 supplement. Totally comprehensive of everything issued with explanations of production,perforation, errors etc - all in extraordinary detail and has full packaging des...

As you have noticed, this is for books with 3d stamps. I have rate card (6) which I believe was the first rate card for books with 3d stamps so rates at beginning 1958. Based on the reorganisation of your rates and the numbers of books quoted as printed (which are always indicative - see catalogue),...