75 GERMANY - AIRMAIL Auction #2317: WORLDWIDE + ARGENTINA: Special May auction Block of Four / Used Cat.#: Sc.C37 Cat.Value: US$136 Fine Sc.C37, 1928/31 4Mk. Zeppelin, used block of 4, minor defect (weak perforation), low start! Starting Price: US$ 25 Current Price: US$ 30 Bid US$ 33 or more Closing: 2023-05-11 22:25:00