Dutch golden age painting worth up to $5m discovered at Blue Mountains property

Experts say 400-year-old work is likely collaboration between Dutch master Willem Claesz Heda and his son

A 400-year-old one in a million" Dutch painting worth up to $5m has been found at a property in the New South Wales Blue Mountains.

Called Still Life, the work was recently located at the National Trust of Australia-managed Woodford Academy during a restoration project.