An incredibly scarce and highly detailed 1956 trade catalog from Charles V. Arnold, the legendary model engineer of Corvallis, Oregon. Filled with precise schematics, pricing lists, and photographic plates of miniature marine, horizontal, and traction steam engines, this catalog is a holy grail for steam engine hobbyists, model engineering collectors, and industrial history enthusiasts. It offers an invaluable, highly collectible window into mid-century American hobbyist craftsmanship and precis