John Foster Tucker III (1950-2008) was a Philadelphia-born rail transit operating official and rail history enthusiast. This collection consists of photographs of trolleys, trains, rails lines, and rail stations in Philadelphia and the city's Pennsylvania suburbs, as well as offices, maintenance shops, and garages used by transit authorities. Most of the collection is devoted to SEPTA, but predecessor companies PTC (Philadelphia Transportation Company) and PSTC (Philadelphia Suburban Transportation Company) are also represented.