Auction # 2048 WORLDWIDE + ARGENTINA: General November auction

GJ.636/654, 1928 first airmail set (19 values), PROOFS printed in the original colors on glazed card, also including 3 proofs (NOT listed by Kneitschel) on thin paper of the values 5c., 18c. and 20c., fine to VF general quality (few with minor defects), VERY RARE LOT!