Here’s another line chart that I’ve found to be more useful than the info on TW-DB for certain models of Smith-Corona machines. For Corona models 1-4 I generally refer to this chart, but for later models up to 1960, this NOMDA chart is very handy:
Here’s another line chart that I’ve found to be more useful than the info on TW-DB for certain models of Smith-Corona machines. For Corona models 1-4 I generally refer to this chart, but for later models up to 1960, this NOMDA chart is very handy: