Oh, I just realized! I've got it too.
The youngest machine in my house is 11 years old. The eldest is dated somewhere in the 1920s and there are 3 between them. All of them are set up to sew in my sewing room and I use them all regularly.
And I never thought I had an addictive personality! I should have known. The first thing I wanted to know about Gram's treadle was how it worked. She taught me how to clean and oil it. Only then did I demand to be shown how to sew. Live and learn.
Thank all of you for the unalloyed pleasure I get from reading "Vintage....". And thank you for giving my mornings something to always look forward to. (I hate mornings on average.)
Pat