Air stamps

Quality: ✉

1943, cover franked with OBP PA16-Cu (horizontal pair + single) "50c on 1,50fr Airmail Stamps 1936 issue", the single stamp with misplaced surcharge "A CHEVAL" and the pair with inverted surcharge, sent from Leopoldville-1 April 23, 1943 to Leopoldville Est, amazing cover, very impressive and scarce usage of curiosities of surcharge, vf