4 stem glasses with cobalt blue overlay & decorative cut decoration around 1930-35

4 stem glasses / wine glasses made of colorless crystal glass, rising disc base with ray-cut decoration on the underside, hexagonally faceted, conical stem shaft notched on the sides, ovoid cup with cobalt blue overlay and polished lip edge, wall with wedge-cut decoration in triple repeat. Stem glasses are in a healthy state. unknown glassworks around 1930-35. Height: approx. 19.7 cm.