v.l.n.r.: Ulrike Zavelberg (Cello), Jana Andraschke (Viola), Martina Horejsi (Violine), Irmgard Zavelberg (Violine) Rubin Quartett Sizes: 150 × 150 / 300 × 121 / 768 × 311 / 1.024 × 414 / 1.800 × 728 v.l.n.r.: Ulrike Zavelberg (Cello), Jana Andraschke (Viola), Martina Horejsi (Violine), Irmgard Zavelberg (Violine)