Original locker trade vintage catalog for CAPITOL MAIL CHUTE CORPORATION, was located at 525 Union Avenue, Brooklyn, NY. Part of an organization of Bronze Manufacturers doing distinctive bronze and metal work since 1905. Post Office Approved. Pictured is a Capitol Mail Chute Model C, Standard letter boxes No. 402, 403, 404 and 312 for post office collection service. Unbound from a large 1938 architectural catalog, this unique old one page technical brochure would display beautifully matted and framed. A fantastic addition to your retro mail system collection.