Image #1
WORLDWIDE AIR POST STAMPS AND POSTAL HISTORY
ARGENTINA
Lot #
30 | P 
| Scott # CB1-5, B12
| 1950, Air Post Semi-Postal stamps, International Philatelic Exhibition, 10+10c - 5+5p, complete set of six imperforate trial color proofs in blocks of four, printed on thick wove paper, no gum as issued, NH, VF, Est. $300-$400 . |