Bonus 1983 Back Order list. The Pacific Fast Mail catalog 15th edition (PFM) is a model train and railroad enthusiast's treasure trove, featuring a scale of 1:5 for detailed and accurate representations of various railroad equipment and accessories. With a focus on Pacific Fast Mail, this catalog provides a comprehensive collection of products for model railroads and trains enthusiasts to enhance their layouts and collections. Whether you're a seasoned model railroader or just starting out, the PFM catalog 15th edition offers a wide array of options to bring your train layouts to life with precision and realism.