Trudy — Your mirror plateau is the standard British version with the correct original paint on the underside. It looks as if there was just the one British manufacturer, unfortunately not yet identified. It's not known if or how much these Briish plateaux were exported. It's latest documented use was in an advertisement published 1 September 1939
here, but these plateaux date back to mid-Victorian times or earlier.
Imported epergnes may not have been imported complete. It's quite possible that an importer fitted foreign flutes into a British epergne block on a British mirror plateau.
Bernard C.
