Trask
Established
see https://cameraquest.com/slr42ae.htm
That said, my favorite M42 camera is the Canon T90 with a M42 to FD adapter. Manual aperture operation, but it has SOOOOO many features I love.
I second this suggestion — I’ve made some fine photographs with M42 lenses on my T90/Canon “P” Lens Mount Converter. Outstanding metering in spot mode. I’ve also used M42 lenses on my Mamiya NC1000S with P-Adapter. I’d like to try a Chinon Memotron because IIRC it reads the light through the lens and sets the shutter speed in the instant after the aperture closes and the mirror starts to rise.