Ornamental Geissler Tube C. 1900

Geissler tube or cathode ray tube.
Physics cabinet demonstration model, with several gases and the presence of an urn or vase with a corrugated rim (made of urethane glass); when the tube was energised by a coil, green fluorescence could be seen spilling out of the vase from the visible hole at the base of the tube.
Nice condition of this sophisticated model of nice size, on a wooden display stand.
Reference: E. Leybold's Nachfolger, Catalogue of Physics Teaching Apparatus Built by E. Leybold's Nachfolger, Cologne: Impr. Paul Gehly, [1905], pp. 776, 8612-8614: "Geissler tube with urethane glass cup".