unused Block of Four  6c. on 2a. yellow, a block of four with sheet margin at right, unused with much original gum, fresh and fine. A very rare multiple being one of three recorded. S.G. 5. Photo
unused Block of Four 6c. on 2a. yellow, a block of four with sheet margin at right, unused with much original gum, fresh and fine. A very rare multiple being one of three recorded. S.G. 5. Photo

Details
unused Block of Four 6c. on 2a. yellow, a block of four with sheet margin at right, unused with much original gum, fresh and fine. A very rare multiple being one of three recorded. S.G. 5. Photo
Provenance
Sigmund Adler, 1960
G.C. Dyer, 1984
Milo D. Rowell, 1992