World Map Mercator's Projection London 1887-90 Cram scarce large detailed mapChart of the World on Mercator's Projection Principal Cities of the Old World. (Old Maps, 19th Century Maps, World Maps, Mercator's Projection, London, Paris, Berlin, St. Petersburg, Vienna, Cairo). Issued 1887 90, Chicago by Cram for the scare large folio Standard American Atlas. Large late 19th century color lithographed map. Not to be confused with the far more common later Cram maps, this much scarcer earlier version is a unique format with a