I didn't know until now but Nikon type K lenses are the latest of Pre AI lenses. Any yes they were made from 75-77. To use these lenses on the FE you will have to flip the AI coupling out of the way and use stop down metering. Not flipping the coupling out of the way you can damage the camera by mounting the lens. My guess that there is some differences in tolerance between the 2 cameras and thus one move the coupling the other less but both gave you wrong meter reading. Actually both should be tight because the lens hit the coupling.