With 14 plates and Case, 1912 After delivering the Monobloc engineer V. Liebe, 1912, Boucher recorded Patent shutter Nil Melior. He collaborated with M. Duchatellier to this new stereo camera. The model shown on this page is one of the three different models of this device. The plate holder, which can hold six white and black plates autocromáticas or four plates, called"" Cartouche PAP"" . The system of using the Autochrome plates is identical to that of the monobloc. To take pictures with these boards, you had to lift the front plate camera lens, which unhooked two shells you square in the back of the lens plate, allowing filters to insert the Lumiere Autochrome.