Interestingly, both IBM and Lexmark trademarks on Selectric™ are dead or expired, and other marks don't conflict.
You likely want to file to claim this.
https://www.trademarkia.com/search/trademarks?q=SELECTRIC&co...
You likely want to file to claim this.
https://www.trademarkia.com/search/trademarks?q=SELECTRIC&co...
If the original owners are so sure the names are dead they let the marks expire, well, "SELECT" electric is pretty good, and fewer people than ever have any exposure to the original, so why not?