The Primavera series, designed by Ercole Barovier and made by the Vetreria Artistica Barovier & C. in the early 1930s, is distinguished by a milky white craquelé glass with the addition of black or blue pasta vitrea trim and decoration. There was a very limited production of this series due to the fact that it was a result of a glass mixture obtained accidentally so it could never be replicated.