A bake­lite tray con­tain­ing 25 glass slides can be insert­ed by flip­ping down the front of the view­er. Then, by depress­ing the lever on the right side of the hous­ing, one slide after anoth­er can be exam­ined. On the left side of the view­er, there is a counter which indi­cates the num­ber of the slide and allows nav­i­ga­tion to a spe­cif­ic slide.
The base of the view­er has one draw­er hold­ing four trays, mak­ing it pos­si­ble to store a total of 100 slides. The stor­age cab­i­net con­tains nine addi­tion­al draw­ers, result­ing in a capac­i­ty of 900 slides in total.
The view­er illus­trat­ed comes with a very rare mag­ni­fi­ca­tion lens attach­ment pro­duced by Richard which can be hung onto the mech­a­nism right in front of the cur­rent slide. The mag­ni­fi­ca­tion achieved is sim­i­lar to the ‘mod­èle optique’ which was only avail­able for the 45x107mm for­mat. Togeth­er with almost 750 fine Autochrome colour slides by a Parisian ama­teur pho­tog­ra­ph­er this is an unique and invalu­able ensemble.