Lot 20537 – 1971 Acharya Narendra 20np colour trials in four d

1971 Acharya Narendra 20np colour trials in four different colours (one in the chosen colour), with a single and a block of four of each, affixed on a cardboard page inscribed “Forwarded for selection of colours” and signed by the General Manager of the India Security Press, label affixed on the reverse indicating the colours used, fine