Lot 60802 – 1d scarlet, specialised study of the T22, U22 and U23

1d scarlet, specialised study of the T22, U22 and U23 control blocks neatly mounted and knowledgeably written up on 29 album pages, with 45 items including control singles, strips of 3 and mostly blocks of six, with a few large including blocks of 8, 18, 21 and 60, showing a wonderful array of overprint, watermark and other control variations, an excellent basis for study and expansion