“You’re looking at a human being instead of an image of a person” – art dealer on how he made a spectacular Rembrandt discovery

When art dealer Jan Six viewed a portrait at Christie’s catalogued as ‘circle of Rembrandt Harmensz van Rijn (1606-1669)’ in 2016, he was convinced it was by the hand of the master. Two years on, it has now gone on view in Amsterdam with its attribution fully confirmed by scholars.