https://en.wikipedia.org/wiki/IBM_MT/ST

https://upload.wikimedia.org/wikipedia/commons/6/6f/IBM_Magnetic_Tape-Selectric_Typewriter_in_use.jpg
Magnetic Tape/Selectric Composer installation in use
Released in 1964 IBM Selectric Composer model 72 in use
By Norsk Teknisk Museum - https://digitaltmuseum.org/011015239419/7-0-ibm-op-fotografier, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=125764277


https://upload.wikimedia.org/wikipedia/commons/2/2a/IBM_Magnetic_Tape-Selectric_Typewriter_panel.jpg
Panel of MT/ST
By Norsk Teknisk Museum - https://digitaltmuseum.org/011015239416/7-0-ibm-op-fotografier, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=125764397

https://files.eric.ed.gov/fulltext/ED112083.pdf