used Block of Four 3d. deep blue on blue, a block of four, top stamps with 16 vertical perfs and lower stamps with 17 vertical perfs, fine appearance and good colour; some creases ending in small tear at right and light touched in surface faults, and split or reinforced perfs, boldly cancelled by c.d.s. (26.4). A rare multiple. S.G. 22, #3800+. Photo in colour