This is a vintage rule book from 1953 titled "THE PENNSYLVANIA RAILROAD Brake And Train Air Signal Instructions". It provides detailed instructions for the use of brake and train air signals, and is a must-have for train enthusiasts and collectors. The book was printed in the United States and is a great addition to any collection of railroadiana and trains. The book is in good condition, with no major marks or damage, and the pages are still intact.