Synonym (also Dalmasso 7-21) for the grape variety San Martino; see there.
There are two grape varieties with this name:
The red grape variety is a new breeding between Chatus (Nebbiolo di Dronero) x Dolcetto. Synonyms are Dalmasso 7-21, Incrocio Dalmasso VII/21 and S. Martino. According to DNA analyses carried out in 2009, the breeding list entry Nebbiolo x Dolcetto was...
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Sigi Hiss
freier Autor und Weinberater (Fine, Vinum u.a.), Bad Krozingen