Title:
Lot 523 The magnificent mint & used study annotated on leaves inc. d & 6d (2) h.s. "SPECIMEN", ½d "Bow flaw" in positional mint block of 4, thirteen used examples of the same flaw (five being the late state), a further example on cover to Germany, three marginal positional blocks of six showing both the "Bow flaw" & the frame flaw (late state, first recorded in 1930), etc., etc. A most informative study. (185 plus two covers).