Czechoslovakia C28-C35 MNH/2 no gum

Czechoslovakia C28-C35, C32-C33 without gum, other MNH, $8.50. Michel 586-593, Euros 11.00, Air Post 1949. Capt. Frantisek Novak, Plane over Bratislava Castle, Charles Bridge, Prague. Surcharged with new value.