Please check the photos for grade, condition and hinging. Lower left stamp without the dash before "MOCKBA" variety. Zagorsky #1756 and #1756 Ka. Liapine #1803I and #P1(1803I). Catalog value from Scott's 2019 Stamp Catalogue is unlisted as offered.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 1955 #C96 Var MNH OG North Pole Stations Airmail Block witho Dash $621.00" is in sale since Sunday, December 17, 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.