NEW HEBRIDES SG233/41var 1977 Port Vila surch 50f on 1f and 100f on 3f U/M Block

1977-78 Port Vila surcharges 50f on 1f and 100f on 3f matching upper right corner blocks of four these were not regularly issued and only available from the Philatelic Bureau unmounted o.g. Attractive and scarce in this positional form.(See catalogue footnote after SG233/41). Purchased from Stanley Gibbons (still on their card)