www.hifiplus.com/articles/eat-e-flat-turntable-and-tonearm/
CEO of the EAT factory (former Tesla Vršovice), Czech citizen Josefína Lichtenegger, spoke about the 70's. Tesla used to supply NAD with the electron tubes and flat arms.
Flat arm was originally designed in the Czech Republic in 1970 by Mr. Janda and Tesla supplied NAD. Mrs. Lichtenegger re-designed the flat arm a few years ago, got rid of the problems by chosing contemporary materials (kevlar and tungsten) and started producing EAT E-Flat in her factory.