Folder: S.F. Bridges-Golden Gate-Construction-Materials.
On back: SPAN TOWER TO SPAN CONTINENT--Picture shows one of the Marin tower legs of the Golden Gate Bridge, as assembled in a test at the steel mill in Pottstown, PA. This structure will be set directly on the concrete Marin pier already completed. This is the first section. Two of these legs are being shipped. The weight of each is more than 750 tons. The shipment will arrive this month, the tower construction work will start in September.".