Looks like it was written on an IBM Executive Model A: https://old.reddit.com/r/typewriters/comments/178vjlf/sample_of_the_chrome_ibm_executives_proportional/

Looks like it was written on an IBM Executive Model A: https://old.reddit.com/r/typewriters/comments/178vjlf/sample_of_the_chrome_ibm_executives_proportional/ https://old.reddit.com/r/typewriters/comments/178vjlf/sample... There were variable-width font typewriters starting in 1930: https://old.reddit.com/r/typewriters/comments/3ltlgn/have_variablewidth_typewriters_ever_existed/ https://old.reddit.com/r/typewriters/comments/3ltlgn/have_va... https://en.wikipedia.org/wiki/Vari-Typer https://en.wikipedia.org/wiki/Vari-Typer