https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8544127Edit ImageSaveSaveEditCropCustom TextAirmail cover sent from Moscow to Berlin (1931) scan of the original. Original public domain image from Wikimedia Commons. Digitally enhanced by rawpixel.MorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGTIFFSmall JPEG 1200 x 984 px | 300 dpiLarge JPEG 3463 x 2839 px | 300 dpiTIFF 3463 x 2839 px | 300 dpi | 56.3 MBFree DownloadAirmail cover sent from Moscow to Berlin (1931) scan of the original. Original public domain image from Wikimedia Commons. Digitally enhanced by rawpixel.More