Auction 90, Session 1 - Worldwide Rare Stamps and Postal History

Argentina - Semi-Postal issues

The auction will start in __ days and __ hours

Start price: $100

Buyer's premium:

1950, International Philatelic Exhibition, 10+10c-5+5p, complete set of six imperforated trial color proofs, blocks of four, printed on thick wove paper, no gum as issued, NH, VF, Est. $150-$200, Sc. #B12, CB1‑5