The guide "Hercules K 50 from 1966" by Bucheli offers a comprehensive overview of all models of the Hercules K 50, including the variants Super Sport, Sprint, SX, RX, SE, RE, SL, RLC, RL, RLC, Ultra, Ultra LC, and Ultra II LC. With a paperback cover and 182 pages, this work is both informative and handy. It is aimed at vehicle enthusiasts and provides detailed information on the various models produced since 1966. The content is written in German and serves as a valuable resource for anyone interested in the history and technology of these motorcycles. The guide was published in 2014 and originates from Germany, which underscores the authenticity and relevance of the information. Whether for collectors, restorers, or simply the curious, this guide is a useful addition to any library.