Lot 70805 – 1930 (Sep 15) 1s sepia & olive with overprint in deep carmine lake with comma flaw between « I » and « R » of « AIR »

1930 (Sep 15) 1s sepia & olive with overprint in deep carmine lake with comma flaw between « I » and « R » of « AIR » in mint left marginal block of four with three normals, usual yellowish gum, very fine and rare variety.Note: Only the small first part of the printing received the deep colour and this flaw only occurs in this printing. Rosenblum stated 10 sheets but more recent research by Mark Robinson and Michael Parrs suggests the number is more likely to be around 20 sheets; hence only 20 examples possible.