1938 Progressive Graphics File Image (Raster) Progressive Graphics File (PGF) is a raster image format developed by Christoph Stamm. Please contact the PRONOM team if you are able to provide a more detailed description. 1 Digital Preservation Department / The National Archives 29 Nov 2017 29 Nov 2017 fmt/1128 PUID pgf File extension 1510 Progressive Graphics File BOF: "PGF", Version = The source code suggests possible versions 2, 5, 6, 7, however samples available from the libpgf SourceForge project site are all version 6. http://libpgf.org/fileadmin/MEDIA/PGF_Details.pdf 1 Absolute from BOF 0 0 504746(02|05|06|07)