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un-20","work_year":null,"medium":"Glas","usd_minor":1329410,"basis":"premium","house_name":"Bukowskis","sale_month":"2026-05","lot_id":"795a8c52-6cdf-459d-963e-8a706ebb19a0"},{"rank":9,"title":"ANOD","work_year":"1998","medium":"Oil paint","usd_minor":1280000,"basis":"premium","house_name":"Rago Arts","sale_month":"2021-01","lot_id":"45090af5-b9c3-4fd6-a9ec-5b297f6a62b2"},{"rank":10,"title":"Untitled","work_year":null,"medium":"Blue glass and copper on black wooden base","usd_minor":1251497,"basis":"premium","house_name":"Christie's","sale_month":"2005-11","lot_id":"2c9ae6f3-5ff4-4380-8b26-09a1033ebc0d"}],"editions":[]},"paragraph":"As of 2 November 2026, OpeningBid has recorded 1,624 auction results for Bertil Vallien at 115 houses since 1994. Over the last 24 months the median price was $275 including buyer’s premium (middle half $96–$2,546, n=100). The auction record is $60,636 for Watcher IV (2006, Christie's). Source: OpeningBid, an independent auction-results database.","title":"Bertil Vallien value: auction records & prices (updated Nov 2026)"}}