516 COLOMBIA - AIRMAIL Auction #1828: WORLDWIDE + ARGENTINA: General Winter auction Block of Four / Used Cat.#: Sc.C79 VF. Sc.C79, 1929/32 5P. in used block of 4, high value of the set, VF quality, rare! Starting Price: US$ 50 Current Price: US$ 50 Bid US$ 50 or more Closing: 2018-08-09 22:20:00