You must be confusing these with something else. Every Selectric had a fixed carriage and moving head. IBM Selectric: https://www.youtube.com/watch?v=vNUEUth7q

You must be confusing these with something else. Every Selectric had a fixed carriage and moving head. IBM Selectric: https://www.youtube.com/watch?v=vNUEUth7qjc https://www.youtube.com/watch?v=vNUEUth7qjc IBM Wheelwriter: https://www.youtube.com/watch?v=ZabsF0aIE6k https://www.youtube.com/watch?v=ZabsF0aIE6k NEC Spinwriter: https://www.youtube.com/watch?v=tCCB0AW9yT4 https://www.youtube.com/watch?v=tCCB0AW9yT4 Diablo: https://www.youtube.com/watch?v=C5bodpSsFl8&t=342 https://www.youtube.com/watch?v=C5bodpSsFl8&t=342 Teletype Model 33: https://www.youtube.com/watch?v=6N8gu5F894k https://www.youtube.com/watch?v=6N8gu5F894k