This is a rare find for enthusiasts and collectors alike - an original EICO Model 944 Construction and Instruction Manual for testers. This manual provides detailed information on the operation and maintenance of the flyback XFMR and yoke tester, as well as diagrams and schematics to assist with troubleshooting and repair. It's a must-have for anyone who wants to learn more about vintage test equipment and how to get the most out of it.