The Piano's seen

I watched this yesterday for the first time since 1961 and since then I have become very interested in early pianos.

Does any one know the instruments used for filming, ... do they still exist, their maker, location now etc?

I distinctly recognised a Viennese fortepiano (possibly by Walter) in one sequence but could not definitively tell what all the others were.

A brilliant movie which, having just read Liszt's Sitwell biography, seems to describe this part of his life fairly accurately.