Please check the photos for grade, condition and hinging. Broken top frame lower left stamp in the block. Catalog value from Scott's 2019 Stamp Catalogue is unlisted as offered.Zagorsky 2013/2014 Russian Stamp Catalogue value is unlisted as a block of four. OTHER ITEMS: Sheets, albums, books, boxes, pages, collections, etc. Please refer to the item description. All payments must be in US funds. The item "Russia 1931 #C22 MNH OG 20k Russian Zeppelin Airship Airmail Block of 4 $900.00" is in sale since Sunday, November 12, 2017. This item is in the category "Stamps\Europe\Russia & Soviet Union". The seller is "sept93" and is located in West Coast. This item can be shipped worldwide.