3 FNH upper blocks of 6 of the 2c & 4c dark violet from the 1935-1965 Fourth Postage Due Issue, with different shades, papers & gums.
The first block is deep reddish lilac on horizontal ribbed paper with yellowish cream gum, the second is deep rose lilac on horizontal ribbed paper with smooth cream gum and the thrid block is milky violet on crisp smooth wove paper with smooth cream gum.
Unitrade values these at $21. The blocks offered here grade 70 as follows:
