American Police Jiu-Jitsu” handbook, authored by Seattle Police Patrolman Svend Jens “Jorgy” Jorgensen. The handbook focuses on defensive tactics and techniques specifically designed for law enforcement. It was published in the early 1930s, with a 2nd edition released in 1931. This specific edition is considered a rare collectible for enthusiasts of jiu-jitsu, police history, and antiques. The guide includes techniques for subject control, such as defenses against stabbing. This is preowned and has visible wear and tear.