Lot 60781 – 2 1/2d to 5d, specialised study of the T22 control

2 1/2d to 5d, specialised study of the T22 control blocks neatly mounted and knowledgeably written up on 20 album pages, with 33 items including control singles, strips of 3 and 5 and mostly blocks of six with one important 3d block of twenty-four, showing a wonderful array of overprint, watermark and other control variations, an excellent basis for study and expansion