Massimo Vignelli (Italian, 1931-2014) for Heller polychrome plastic dinnerware set twelve (12) small plates, six (6) handled cups, eight (8) bowls, three (3) large dinner plates, ten (10) luncheon dishes. Each marked "Heller" to undersides. 39 pieces total.

Dimensions for large plates: 13.25" diameter. 

Dealer: S138XX