Tonga 1968 8s on 8d black and greenish yellow error, SG265aTonga 1968 (19 Dec) South Pacific Games 8s on 8d black and greenish yellow, ERROR SMALL SURCHARGE (11mm wide) intended for the 6s on 6d value, lower right corner block of 4 from left pane with plate numbers "1 1" and athletes (part of surcharge) in margins, SG265a. Pristine unmounted mint positional block with full original gum. A unique positional multiple from the one sheet of 120 issued, most of which was used (by the Philatelic Bureau in