Original Milestone 12 - Missing A Plinth for Mile 12 now stands about where the original one should be.
*Above banner image was taken at Hopewell Furnace National Historic Site, PA. http://www.nps.gov/hofu/index.htm
These new milestones are called Plinths and are 8 feet high as opposed to the early milestones that were from 18 inches to 4 feet high. These stones on steroids were put up as part of the Radnor Enhancement Project and there appear to be at least 5 of them. Three of them represent replaced Milestones, one portrays the Radnor Township Seal and one annouches Radnor High School. A sketch of the original Milestone is below at left. It was supposed to be in the area of Villanova College but I couldn't locate it.
A Terrain map with the salmon colored stickpin showing the general location of Plinth 12