North Borneo 1909-23 3c black and green SG163sNorth Borneo 1909 23 3c black and green, overprint 'SPECIMEN' (type W4 in red), vertical pair, fine original gum. This new colour appeared in 1923, 14 years after the rest of the set (which had type NB6), and even single examples are elusive. Very scarce in a multiple. Specimen. SG 163s ALERT ME WHEN ANOTHER IS AVAILABLE > SELL ONE OF THESE >
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