DuPont Company, skywalk over Tatnall St., 1939 Image Read more about DuPont Company, skywalk over Tatnall St., 1939
DuPont Company, skywalk spanning Tatnall St., 1939 Image Read more about DuPont Company, skywalk spanning Tatnall St., 1939
Dupont Company., walkway spanning Tatnall St., 1939 Image Read more about Dupont Company., walkway spanning Tatnall St., 1939
