From the Lenora Street overpass on the bottom to part of Pier 2 at Yesler Way and just beyond Colman Dock. Surely there are enough details in this aerial to date it to the year. The Alaskan Way Viaduct opened to traffic in 1953. The International Style glass box Norton Building at the northwest corner of Second Ave. and Columbia Street appeared in 1959. Here you have your limits, now may we ask that you date it?