Electronics Australia 1973, for us kids, Certron and Memorex were cheap dime store tapes that sounded awful.
I found a cool paper from Ampex over on worldradiohistory.com, lot's of little nuggets of cassette archaeology. Kind of like Xerox and GUI, I don't think Ampex get's the credit it deserves outside of maybe commercial settings. https://www.worldradiohistory.com/Archive-Catalogs/Ampex/TheAmpexStory.pdf
The new issue of Stereo Era has this tidbit on the Hitachi and fountain pen promo? https://www-amazon-co-jp.translate....uto&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp
The X Poster says this is the first advertising with the "new" Maxell Logo from 1970. I wonder what all the batter formulations are for, I feel like we just had two, normal and alkaline.