Federico Frezzi — 15th century; Italy

Boccaccio, Federigo Frezzi — 15th century, second half; Italian, north (Bologna?)

Petrarch, Dante, etc. — 15th century, third quarter; Italian, Venice (?)

Dante, Bernardus de Canaccio, etc. — 14th century, late, or 15th century, early; Italian (Florence (?): see Pächt and Alexander)

Girolamo da Siena, etc. — 1400s; Italian, likely made in or around Venice