Each framed film cell mount display comes with an engraved or screen printed plaque stating that these are "Original Film Cells" also supplied is a Certificate of Authenticity dated and signed to guarantee that these are Original Film Cells, all cells are mounted onto black premium quality acid free board, front in black and rear closing board in cream. All apertures are cut at a 40 degree bevel and come with a pre-cut back to ensure that each film cell can be viewed clearly. It is then framed and enclosed with two clear Perspex windows to ensure that your film cells are kept free from dust.