For each of the 11 denominations, cylinder proofs were taken for each of the four colours used in printing the individual stamps. None of these proofs existed in private hands prior to the two 1980’s Australia Post Archival Sales, when 16 sets were released. All have been tightly held and seldom seen in the secondary market. As issued, mint unhinged and superb.

Cover, back stamped Hobart 25 March 1931. Very fine and neat.