German 3-Color Camera

unbranded German folding plate camera for three 9x12cm colour separations, folding mahogany body with black brass fittings and dark red bellows, Tessar 4.5/18cm no.507206, adjustable ground glass holder (with box), three long book-form plate holders in dark sliders, one 13x18cm double plate holder, rare and early 3-colour camera - all in very fine original condition