Koller PostWar & Contemporary AUKTION Samstag, 4. Juli 2020, 14 Uhr

| 97 3791 JEAN TINGUELY (Fribourg 1925–1991 Bern) Roto ZAZA N° 1. 1967. Felt pen, pen and colour pen on wove paper. Signed and dated lower right: 1967 J. Tinguely. 24.4 × 31.4 cm. Provenance: Private collection Switzerland. CHF 2 000 / 3 000 (€ 1 900 / 2 860) 3792* ROLF ISELI (Bern 1934–lives and works a.o. in Bern) Untitled. 1988. Coal, chalk and opaque white on wove paper. Signed, dated and with location lower right: Rolf Iseli 81 St. Romain 81, as well as with a red stamp. 169.9 × 90 cm. CHF 5 000 / 7 000 (€ 4 760 / 6 670)