This is the prototype of the Pioneer III car, built in 1956 by The Budd Company. It is a low cost, ultra-light car concept (26.5 tons), using extensively plastics and a spartan interior. These cars were destined for large scale production, but, as passenger service was declining in the U.S.A. during the fifties, these units were only delivered as commuter train cars in that country. They were built in Brazil by Mafersa, a Budd licensee, between 1963 and 1966; these cars were designated as the 800 series. They were delivered to E.F. Sorocabana, Companhia Mogiana and E.F. Araraquara for use in long distance trains, despite the problems they showed, like a decreased comfort level and frequent air conditioning equipment failures. This photo, shot by L.S. Williams, was originally published at the book "The American Railroad Passenger Car", volume I. The copy seen in this Album is courtesy of Maurício Torres, from Miami, U.S.A.