It's an amazing system, and astounding accomplishment that began as early as the 1860's and continue to blossom and expand for the century to come. This remarkable reference puts an age and back story to each line, with notations on many of the openings for each stop. Formed to the real geography, and not to Beck's standardized conceptual map of the tube system, it's an absorbing image that brings this amazing infrastructure to a new life.
Condition is very good with one marginal tear. Image size is approximately 19.25 x 35.5 (inches),