This is an original fold-out pocket London Tube map (size approx 6" x 3" folded, opening out to 6" x 12") published by TfL for London Underground; dated December 2016, it features "Metropolitan Diamonds" (by Gillian Carnegie) on the front cover and a small TfL advert for Day Travelcards on the back cover. 

• It's in very good pre-owned condition with minimal signs of handling, virtually as new; it's unmarked & undamaged and will be posted in a card-backed envelope for added protection.