This plan book is a must-have for any collector or enthusiast of standard gauge Climax locomotives. The Kemtron Plan Book No. 13 features detailed diagrams and instructions for building O and HO scale models. Whether you're a seasoned builder or just starting out, this book is an invaluable resource for creating accurate and authentic models. In addition to the comprehensive instructions, this plan book is in excellent condition. The pages are clean and free of any marks or tears. This rare find is a great addition to any collection of railroadiana paper items and is sure to impress any collector or hobbyist.