Original vintage architectural trade magazine ad for P. & F. CORBIN of New Britain, CT.  The Fuller Building at Broadway and 5th Ave in New York City, popularly known as The Flat Iron Building, is equipped throughout with Corbin Builders' Hardware of Special Design, made from Drawings Furnished by the architects, D. H. Burnham and Company.  Corbin Unit Locks are used on all Doors. Old 1911 building construction industry advertisement.