I also am nuts for vintage sewing machines. Most of mine are Singers, but my first treadle was a Standard. Other than my embroidery machine, my newest sewing machine is a '70s Kenmore. Next is a '60s White I inherited from my mother. My Singers include a 2-99s, 27 treadle, 101, 201, 221, 301.
I love the fact that they are simple, sturdy, and they will likely outlast me. I got a real thrill when I tested my vintage buttonholer on my Singer 27 treadle and it worked beautifully.