Postage due covers

Quality: ✉

1946 letter franked at 50c with N° 234 from Luluabourg 9/7/46 to Monkoto, on the back transit mark Leopoldville 14/08/46 and Coquilhatville 15/08/46, rate valued at 1.50 Fr in Monkoto with a half stamp at 1 Fr (N° 257) - rare, vf