Awesome find! That letter could almost have been written this century. 😉
And wow, I didn’t know Sony had a prototype 8mm system that early. Lots of fascinating ancient tech in those pages. I didn’t know there were descrambler boxes with built in speakers designed to thwart VCR recording either. Diabolical!
The all black and white interior pages and simple layout remind me of the '70’s CB Radio magazines my Dad used to read.