Lot 50650 – 1972 Shackleton 1 1/2p Endurance mint n.h. imperforate right marginal

1972 Shackleton 1 1/2p Endurance mint n.h. imperforate right marginal, very fine and scarce variety, noted in Heijtz as only one sheet of 50 known and that “imperforate stamps could be working proofs rather than issued stamps”; cert. Heitz (2003) with image of the discovered sheet and this stamp’s position on the sheet (Heijtz 109v1, £500)