it looks like a 19 superba
i have one of those, it was my first dishwasher i started collecting about 5 years ago, bought it off e bay and paid too much for it also! but hey, i wanted it at the time!
this could be a great old hobart dishwasher for someone if given a good tune up once they get it. i would def change the seal once i got it.
i have paid up to $200 each for some of my kitchenaids, not 19's though, i only paid that much for 17 superbas. most of the others i offered 50 to 100 bucks for.
it is a beautiful classic machine by hobart, if i lived closer i might be interested myself. love those portables! someone will grab it!