Maybe you know this exceptional Swiss cheese, but probably you don’t. I rarely see it at retail counters. It doesn’t get much press. Yet it’s a benchmark cheese, in my view, made by ultra-traditional methods that are vanishing. Even in the rarefied world of Swiss alpine cheesemaking, it stands out for the stringent rules that govern its production. My favorite book on Switzerland’s cheeses, Swiss Cheese by Dominik Flammer and Fabian Scheffold, calls it “the most aboriginal of all Alpine cheeses.”