It apprears to me that this map has been cut or folded as the western end and eastern end are missing. Seeing these would help date this map.
Mr. Notinmyneighborhood, we are all speculating the orgins of this map, but we have not heard from you. What can YOU tell US about this map?
Also, I seem to recall seeing a simular map on e-bay.Did this come from there?
Don't strain your brain, paint a train.....