Originated with Frau Isabella Buhrer-Keel of Basel, Switzerland who obtained the seeds from an Italian man whose mother grew this tomato in Naples, Italy. Frau Isabella Buhrer-Keel donated seed to ProSpecieRara, Aarau, Switzerland. First offered in the Seed Savers 2003 Yearbook by Sylvia Davatz of Hartland, Vermont, who received seeds from Pro Specie Rara, the Swiss Seed Savers Exchange, in 2001. Indeterminate, regular leaf plant produces 6-10 oz., red, pleated fruits. The name means “toothed” in German, and slices certainly present this appearance. Semi-hollow tomatoes are firm and mild-tasting; great for stuffing. Very productive, even in hot, dry condition. Great for sauce or canning.