Lot 31975 – 1916-23 1/2d Yellow-Green mint nh upper marginal block of four showing varieties and overprint double, one albino

1916-23 1/2d Yellow-Green mint nh upper marginal block of four showing varieties “short N” (R1/8) and “dropped cliche” (R2/7), exceptionally with overprint double, one albino, the albino impressions at the top of the stamp (11mm above the inked opt) and very clear on the upper pair, minor gum bends but a unique positional multiple with this combination of varieties which does not precisely conform to the description of the 1/2d albinos given by Buckingham on p.77 of his book