United Kingdom, First Union Jack Small 251×320 Medium 503×640 Large 805×1024 Download Tiff Original 2000×2545 | (4.9 MB) Description United Kingdom, First union jack Keywords First union jack, flags of the world, United Kingdom Galleries United Kingdom Flags and Seals, World Flags, Black and White Source: Encyclopaedia Britannica (New York: The Encyclopaedia Britannica Company, 1903) 9:278