Lot 31986 – 1977-78 Port Vila surcharges 50f on 1f and 100f on 3f in mint nh matching upper right corner blocks of four

1977-78 Port Vila surcharges 50f on 1f and 100f on 3f in mint nh matching upper right corner blocks of four, very fine, these were not regularly issued and only available from the Philatelic Bureau (see catalogue footnote after SG233/41)