3d. on 30 pfg., position 2, irregular block of four, the lower stamp with surcharge omitted, fresh color and good perforation, unused, some very minor aging on the lower right stamp, some light hinge reinforcements between stamps, a spectacular and extremely attractive unit, one of the great rarities with only four known pairs, signed Fields and certificate BPA (1989)
Provenance: Collection Marquess of Bute (Robson Lowe, 1959)
Robert M. Gibbs (78th. Corinphila Auction, 1988)
Reference: depicted in G.R.I. by Robert M. Gibbs, page 84
