Hello, I have a patron who found this World War One battlefield map in the bottom of a box of stuff he bought at a garage sale. He would like to know if it is rare and/or valuable. The base map is “Carte de France 1:600,000.” Do any of you have similar maps in your collections, or have knowledge of its value / rarity? Thanks, Jim Jim Coombs Maps & GIS Librarian Missouri State University Springfield, MO 65897 (417) 836-4534 [log in to unmask]<mailto:[log in to unmask]>