Bidspirit auction | Worldwide Pioneer Flights - Canada

Worldwide Pioneer Flights - Canada - Newfoundland - 1932, DO-X Trans-Atlantic Flight, red surcharge $1.50 on $1 blue, in addition two unissued stamps of $1 dark blue, prepared for that flight, all with full OG, first one is hinged with gum wave at bottom right, others - NH or LH, VF, C.v. $345, Est. $120-$150, Sc. #C12, footnote