Auction 321 - 332 Australian States & Commonwealth of Australia, St. Helena, Basutoland, Bechuanaland, Swaziland, Brazil 1843 –1870 - Day 1

1937 (May 13): Coronation Issue, the set of three values in matching Imperforate Proof blocks of four, each marginal from left of sheet, and each perforated "SPECIMEN" (Samuel type 20), fresh and fine, stamps unmounted og. Just six sets of three of these Proofs were produced, thus this set in blocks of four is unique.