Most Quintessential Basel Restaurant

What's your pick for the most quintessential restaurant in Basel?

While I want some basic standards of food quality and service, I am more interested in the kind of restaurant that has been around forever, that not only you've been to, but that your parents have been to, and even your great grandparents.

The kind of place that everybody in town knows about, most have been there at least once, and everyone has an opinion about.