A grid painting by Otto Piene, estimated at SFr100,000-150,000 at Koller.
Among the lots is this trademark grid painting by Otto Piene, founder of the Zero group of artists, will be included.
Rasterbild 2, an oil on canvas from 1957 measuring 19½in x 2ft 3in (50 x 70 cm) and signed and dated on the reverse, has an estimate of SFr100,000-150,000.
