1933 SG235a.
$4.50 on 75c Yellow-brown. 'SURCHARGE INVERTED'.
AIR BALBO MASS TRANSATLANTIC FLIGHT.
Brilliant fresh mint with beautiful colour and perforations.
David Brandon, Alberto Diena and Enzo Diena Certificates.
Position 1 of the UNIQUE 'sheet' of four stamps.
THE RAREST AND MOST IMPORTANT ITEM OF NEWFOUNDLAND AND ALL AIR MAIL PHILATELY .