Radio Fan's mag 'On the Air' Oct 1925 issue (ads!)
https://web.archive.org/web/20210301144621/https://www.otrr.org/FILES/Magz_pdf/OTA%20-%20Vintage/On%20The%20Air%202510.pdf
Back when radio was new ... imagine
Several more issues here: https://web.archive.org/web/20210301110419/https://www.otrr.org/FILES/Magz_pdf/OTA%20-%20Vintage/
Way too much more OTRR archive here:
https://web.archive.org/web/20210301110335/https://otrr.org/FILES/Magz_pdf/