A Rare Crookes Tube Containing Rubys

German, c.1890, unmarked the tube with small brass caps, red glass-covered electrodes, containing a white glass ball with several ruby fragments, with an old handwritten label 'Ruby Tube 1/1/- on the original turned wooden base, tube height

Note: tube working at time of cataloguing

Provenance: with old original Christes sale label dated 08 Dec 1988, lot 92